NEET 2013 · Biology

NEET 2013 Biology Questions with Solutions

The NEET 2013 paper had 90 Biology questions from 33 chapters. By section: 45 Botany and 45 Zoology.

Cell: The Unit of Life and Sexual Reproduction in Flowering Plants had the most questions (6 each), followed by Biodiversity and Conservation, Evolution and Principles of Inheritance and Variation with 5 each.

16 questions below have the answer and explanation free; the other 74 are in Premium.

Practise NEET 2013 Biology free
Biology questions
90
Chapters covered
33
Solved free here
16 of 90
Easy / Medium / Hard
29 / 48 / 13

Difficulty is NEET MIND's own tag for each question.

Chapter-wise: NEET 2013 Biology

How many questions each chapter had in NEET 2013. Open a chapter for its questions from every year.

  1. Cell: The Unit of Life· Botany6 Qs
  2. Sexual Reproduction in Flowering Plants· Botany6 Qs
  3. Biodiversity and Conservation· Botany5 Qs
  4. Evolution· Botany5 Qs
  5. Principles of Inheritance and Variation· Zoology5 Qs
  6. Animal Kingdom· Zoology4 Qs
  7. Biomolecules· Botany4 Qs
  8. Human Reproduction· Zoology4 Qs
  9. Anatomy of Flowering Plants· Botany3 Qs
  10. Biological Classification· Botany3 Qs
  11. Body Fluids and Circulation· Zoology3 Qs
  12. Cell Cycle and Cell Division· Botany3 Qs
  13. Ecosystem· Botany3 Qs
  14. Locomotion and Movement· Zoology3 Qs
  15. Morphology of Flowering Plants· Botany3 Qs
  16. Plant Kingdom· Botany3 Qs
  17. Reproductive Health· Zoology3 Qs
  18. Biotechnology: Principles and Processes· Botany2 Qs
  19. Chemical Coordination and Integration· Zoology2 Qs
  20. Human Health and Disease· Zoology2 Qs
  21. Microbes in Human Welfare· Botany2 Qs
  22. Molecular Basis of Inheritance· Zoology2 Qs
  23. Neural Control and Coordination· Zoology2 Qs
  24. Organisms and Populations· Zoology2 Qs
  25. Respiration in Plants· Botany2 Qs
  26. Biotechnology and Its Applications· Botany1 Q
  27. Breathing and Exchange of Gases· Zoology1 Q
  28. Excretory Products and Their Elimination· Zoology1 Q
  29. Photosynthesis in Higher Plants· Botany1 Q
  30. Plant Growth and Development· Botany1 Q
  31. Strategies For Enhancement In Food Production· Zoology1 Q
  32. Structural Organisation in Animals· Zoology1 Q
  33. The Living World· Botany1 Q

All 90 NEET 2013 Biology questions

In paper order. Try each one, then open the answer where it is shown.

  1. Question 1 (NEET 2013, Q91)

    Sexual Reproduction in Flowering PlantsBotanyMedium
    Select the wrong statement:
    1. Option A: Isogametes are similar in structure, function and behaviour
    2. Option B: Anisogametes differ either in structure, function or behaviour
    3. Option C: In Oomycetes female gamete is smaller and motile, while male gamete is larger and non-motile
    4. Option D: Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy

    The answer and explanation for this question are in NEET MIND Premium.

  2. Question 2 (NEET 2013, Q92)

    The Living WorldBotanyEasy
    Which one of the following is not a correct statement?
    1. Option A: Herbarium houses dried, pressed and preserved plant specimens
    2. Option B: Botanical gardens have collection of living plants for reference
    3. Option C: A museum has collection of photographs of plants and animals
    4. Option D: Key is a taxonomic aid for identification of specimens

    The answer and explanation for this question are in NEET MIND Premium.

  3. Question 3 (NEET 2013, Q93)

    Plant KingdomBotanyMedium
    Isogamous condition with non-flagellated gametes is found in
    1. Option A: Chlamydomonas
    2. Option B: Spirogyra
    3. Option C: Volvox
    4. Option D: Fucus
    Show answer & explanation

    Correct answer: (B) Spirogyra

    Explanation

    In Spirogyra reproduction is isogamous and gametes are non-motile (non-flagellated).

  4. Question 4 (NEET 2013, Q94)

    Biological ClassificationBotanyMedium
    Besides paddy fields, cyanobacteria are also found inside vegetative part of
    1. Option A: Pinus
    2. Option B: Cycas
    3. Option C: Equisetum
    4. Option D: Psilotum
    Show answer & explanation

    Correct answer: (B) Cycas

    Explanation

    Cyanobacteria such as Anabaena occur symbiotically in the coralloid roots of Cycas.

  5. Question 5 (NEET 2013, Q95)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    Megasporangium is equivalent to
    1. Option A: Embryo sac
    2. Option B: Fruit
    3. Option C: Nucellus
    4. Option D: Ovule

    The answer and explanation for this question are in NEET MIND Premium.

  6. Question 6 (NEET 2013, Q96)

    Plant KingdomBotanyHard
    Read the following statements (A–E) and answer the question that follows them: (A) In liverworts, mosses and ferns gametophytes are free-living. (B) Gymnosperms and some ferns are heterosporous. (C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous. (D) The sporophyte in liverworts is more elaborate than that in mosses. (E) Both Pinus and Marchantia are dioecious. How many of the above statements are correct?
    1. Option A: One
    2. Option B: Two
    3. Option C: Three
    4. Option D: Four
    Show answer & explanation

    Correct answer: (C) Three

    Explanation

    Statements A, B and C are correct. Statement D is incorrect because moss sporophyte is more elaborate than liverwort. Statement E is incorrect because Pinus is monoecious. Hence total correct statements = 3.

  7. Question 7 (NEET 2013, Q97)

    Morphology of Flowering PlantsBotanyHard
    Among bitter gourd, mustard, brinjal, pumpkin, china rose, lupin, cucumber, sunflower, gram, guava, bean, chilli, plum, petunia, tomato, rose, withania, potato, onion, aloe and tulip how many plants have hypogynous flowers?
    1. Option A: Six
    2. Option B: Ten
    3. Option C: Fifteen
    4. Option D: Eighteen
    Show answer & explanation

    Correct answer: (C) Fifteen

    Explanation

    Hypogynous flowers among the listed plants total fifteen.

  8. Question 8 (NEET 2013, Q98)

    Anatomy of Flowering PlantsBotanyMedium
    Interfascicular cambium develops from the cells of
    1. Option A: Medullary rays
    2. Option B: Xylem parenchyma
    3. Option C: Endodermis
    4. Option D: Pericycle
    Show answer & explanation

    Correct answer: (A) Medullary rays

    Explanation

    Interfascicular cambium originates from medullary ray cells during secondary growth.

  9. Question 9 (NEET 2013, Q99)

    Morphology of Flowering PlantsBotanyMedium
    In China rose the flowers are
    1. Option A: Actinomorphic, hypogynous with twisted aestivation
    2. Option B: Actinomorphic, epigynous with valvate aestivation
    3. Option C: Zygomorphic, hypogynous with imbricate aestivation
    4. Option D: Zygomorphic, epigynous with twisted aestivation

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  10. Question 10 (NEET 2013, Q100)

    Anatomy of Flowering PlantsBotanyEasy
    Lenticels are involved in
    1. Option A: Transpiration
    2. Option B: Gaseous exchange
    3. Option C: Food transport
    4. Option D: Photosynthesis
    Show answer & explanation

    Correct answer: (B) Gaseous exchange

    Explanation

    Lenticels are lens-like openings in periderm that facilitate gaseous exchange during secondary growth.

  11. Question 11 (NEET 2013, Q101)

    Anatomy of Flowering PlantsBotanyEasy
    Age of a tree can be estimated by
    1. Option A: Its height and girth
    2. Option B: Biomass
    3. Option C: Number of annual rings
    4. Option D: Diameter of its heartwood
    Show answer & explanation

    Correct answer: (C) Number of annual rings

    Explanation

    Each annual ring represents one year of growth. Therefore: Age of tree=Number of annual rings\text{Age of tree} = \text{Number of annual rings}

  12. Question 12 (NEET 2013, Q102)

    Morphology of Flowering PlantsBotanyEasy
    Seed coat is not thin, membranous in
    1. Option A: Maize
    2. Option B: Coconut
    3. Option C: Groundnut
    4. Option D: Gram

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  13. Question 13 (NEET 2013, Q103)

    BiomoleculesBotanyMedium
    Transition state structure of the substrate formed during an enzymatic reaction is
    1. Option A: Transient but stable
    2. Option B: Permanent but unstable
    3. Option C: Transient and unstable
    4. Option D: Permanent and stable

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  14. Question 14 (NEET 2013, Q104)

    BiomoleculesBotanyMedium
    A phosphoglyceride is always made up of
    1. Option A: Only a saturated fatty acid esterified to glycerol to which a phosphate group is also attached
    2. Option B: Only an unsaturated fatty acid esterified to glycerol to which a phosphate group is also attached
    3. Option C: A saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached
    4. Option D: A saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule

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  15. Question 15 (NEET 2013, Q105)

    Biological ClassificationBotanyEasy
    Pigment-containing membranous extensions in some cyanobacteria are
    1. Option A: Heterocysts
    2. Option B: Basal bodies
    3. Option C: Pneumatophores
    4. Option D: Chromatophores
    Show answer & explanation

    Correct answer: (D) Chromatophores

    Explanation

    Chromatophores contain photosynthetic pigments in cyanobacteria.

  16. Question 16 (NEET 2013, Q106)

    Cell: The Unit of LifeBotanyEasy
    A major site for synthesis of lipids is
    1. Option A: RER
    2. Option B: SER
    3. Option C: Symplast
    4. Option D: Nucleoplasm

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  17. Question 17 (NEET 2013, Q107)

    Cell Cycle and Cell DivisionBotanyMedium
    The complex formed by a pair of synapsed homologous chromosomes is called
    1. Option A: Equatorial plate
    2. Option B: Kinetochore
    3. Option C: Bivalent
    4. Option D: Axoneme

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  18. Question 18 (NEET 2013, Q108)

    Respiration in PlantsBotanyHard
    The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products. Arrows numbered 4, 8, and 12 can all be
    1. Option A: NADH
    2. Option B: ATP
    3. Option C: H2OH_2O
    4. Option D: FAD+FAD^+ or FADH2FADH_2
    Show answer & explanation

    Correct answer: (B) ATP

    Explanation

    ATP is generated in glycolysis and Krebs cycle by substrate-level phosphorylation and in electron transport chain by oxidative phosphorylation. Therefore arrows 4, 8 and 12 represent ATP.

  19. Question 19 (NEET 2013, Q109)

    Cell: The Unit of LifeBotanyEasy
    The most abundant intracellular cation is
    1. Option A: Na+Na^+
    2. Option B: Ca++Ca^{++}
    3. Option C: H+H^+
    4. Option D: K+K^+

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  20. Question 20 (NEET 2013, Q110)

    Plant Growth and DevelopmentBotanyMedium
    During seed germination its stored food is mobilized by
    1. Option A: Ethylene
    2. Option B: Cytokinin
    3. Option C: ABA
    4. Option D: Gibberellin

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  21. Question 21 (NEET 2013, Q111)

    Cell: The Unit of LifeBotanyEasy
    Which of the following criteria does not pertain to facilitated transport?
    1. Option A: Requirement of special membrane proteins
    2. Option B: High selectivity
    3. Option C: Transport saturation
    4. Option D: Uphill transport

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  22. Question 22 (NEET 2013, Q112)

    Photosynthesis in Higher PlantsBotanyMedium
    The first stable product of fixation of atmospheric nitrogen in leguminous plants is
    1. Option A: NO2−NO_2^-
    2. Option B: Ammonia
    3. Option C: NO3−NO_3^-
    4. Option D: Glutamate

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  23. Question 23 (NEET 2013, Q113)

    Respiration in PlantsBotanyMedium
    Which of the metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
    1. Option A: Glucose-6-phosphate
    2. Option B: Fructose-1,6-bisphosphate
    3. Option C: Pyruvic acid
    4. Option D: Acetyl CoA
    Show answer & explanation

    Correct answer: (D) Acetyl CoA

    Explanation

    Acetyl CoA is the common intermediate entering the Krebs cycle during metabolism of fats, carbohydrates and proteins.

  24. Question 24 (NEET 2013, Q114)

    Sexual Reproduction in Flowering PlantsBotanyMedium
    Which one of the following statements is correct?
    1. Option A: Hard outer layer of pollen is called intine
    2. Option B: Sporogenous tissue is haploid
    3. Option C: Endothecium produces the microspores
    4. Option D: Tapetum nourishes the developing pollen

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  25. Question 25 (NEET 2013, Q115)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    Product of sexual reproduction generally generates
    1. Option A: Longer viability of seeds
    2. Option B: Prolonged dormancy
    3. Option C: New genetic combination leading to variation
    4. Option D: Large biomass

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  26. Question 26 (NEET 2013, Q116)

    Cell Cycle and Cell DivisionBotanyEasy
    Meiosis takes place in
    1. Option A: Meiocyte
    2. Option B: Conidia
    3. Option C: Gemmule
    4. Option D: Megaspore

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  27. Question 27 (NEET 2013, Q117)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    Advantage of cleistogamy is
    1. Option A: Higher genetic variability
    2. Option B: More vigorous offspring
    3. Option C: No dependence on pollinators
    4. Option D: Vivipary

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  28. Question 28 (NEET 2013, Q118)

    Plant KingdomBotanyMedium
    Monoecious plant of Chara shows occurrence of
    1. Option A: Antheridiophore and archegoniophore on the same plant
    2. Option B: Stamen and carpel on the same plant
    3. Option C: Upper antheridium and lower oogonium on the same plant
    4. Option D: Upper oogonium and lower antheridium on the same plant
    Show answer & explanation

    Correct answer: (D) Upper oogonium and lower antheridium on the same plant

    Explanation

    In Chara, oogonium is present above and antheridium below on the same plant.

  29. Question 29 (NEET 2013, Q119)

    Sexual Reproduction in Flowering PlantsBotanyMedium
    Perisperm differs from endosperm in
    1. Option A: Being a haploid tissue
    2. Option B: Having no reserve food
    3. Option C: Being a diploid tissue
    4. Option D: Its formation by fusion of secondary nucleus with several sperms

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  30. Question 30 (NEET 2013, Q120)

    Principles of Inheritance and VariationBotanyHard
    Which of the following statements is not true of two genes that show 50% recombination frequency?
    1. Option A: The genes may be on different chromosomes
    2. Option B: The genes are tightly linked
    3. Option C: The genes show independent assortment
    4. Option D: If the genes are present on the same chromosome, they undergo more than one crossover in every meiosis

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  31. Question 31 (NEET 2013, Q121)

    EvolutionBotanyEasy
    Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
    1. Option A: Gene flow
    2. Option B: Genetic drift
    3. Option C: Random mating
    4. Option D: Genetic load

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  32. Question 32 (NEET 2013, Q122)

    Principles of Inheritance and VariationBotanyMedium
    If two persons with AB blood group marry and have sufficiently large number of children, the blood groups observed are A:B:AB=1:2:1A:B:AB = 1:2:1. Modern electrophoresis reveals presence of both A and B type proteins in AB blood group individuals. This is an example of
    1. Option A: Codominance
    2. Option B: Incomplete dominance
    3. Option C: Partial dominance
    4. Option D: Complete dominance

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  33. Question 33 (NEET 2013, Q123)

    EvolutionBotanyMedium
    The process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental challenge is called
    1. Option A: Natural selection
    2. Option B: Convergent evolution
    3. Option C: Non-random evolution
    4. Option D: Adaptive radiation

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  34. Question 34 (NEET 2013, Q124)

    EvolutionBotanyMedium
    The tendency of population to remain in genetic equilibrium may be disturbed by
    1. Option A: Random mating
    2. Option B: Lack of migration
    3. Option C: Lack of mutations
    4. Option D: Lack of random mating

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  35. Question 35 (NEET 2013, Q125)

    Biotechnology and Its ApplicationsBotanyEasy
    Which of the following Bt crops is being grown in India by farmers?
    1. Option A: Maize
    2. Option B: Cotton
    3. Option C: Brinjal
    4. Option D: Soybean

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  36. Question 36 (NEET 2013, Q126)

    Microbes in Human WelfareBotanyMedium
    A good producer of citric acid is
    1. Option A: Aspergillus
    2. Option B: Pseudomonas
    3. Option C: Clostridium
    4. Option D: Saccharomyces

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  37. Question 37 (NEET 2013, Q127)

    Biotechnology: Principles and ProcessesBotanyEasy
    DNA fragments generated by restriction endonucleases in a chemical reaction can be separated by
    1. Option A: Centrifugation
    2. Option B: Polymerase chain reaction
    3. Option C: Electrophoresis
    4. Option D: Restriction mapping

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  38. Question 38 (NEET 2013, Q128)

    Cell: The Unit of LifeBotanyMedium
    Which of the following is not correctly matched for the organism and its cell wall degrading enzyme?
    1. Option A: Bacteria – Lysozyme
    2. Option B: Plant cells – Cellulase
    3. Option C: Algae – Methylase
    4. Option D: Fungi – Chitinase

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  39. Question 39 (NEET 2013, Q129)

    Biotechnology: Principles and ProcessesBotanyHard
    The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because of
    1. Option A: Non-recombinant bacteria containing beta-galactosidase
    2. Option B: Insertional inactivation of alpha-galactosidase in non-recombinant bacteria
    3. Option C: Insertional inactivation of alpha-galactosidase in recombinant bacteria
    4. Option D: Inactivation of glycosidase enzyme in recombinant bacteria

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  40. Question 40 (NEET 2013, Q130)

    Biological ClassificationBotanyEasy
    Which of the following are likely to be present in deep sea water?
    1. Option A: Archaebacteria
    2. Option B: Eubacteria
    3. Option C: Blue-green algae
    4. Option D: Saprophytic fungi

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  41. Question 41 (NEET 2013, Q131)

    EcosystemBotanyEasy
    Natural reservoir of phosphorus is
    1. Option A: Sea water
    2. Option B: Animal bones
    3. Option C: Rock
    4. Option D: Fossils

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  42. Question 42 (NEET 2013, Q132)

    EcosystemBotanyMedium
    Secondary productivity is rate of formation of new organic matter by
    1. Option A: Producer
    2. Option B: Parasite
    3. Option C: Consumer
    4. Option D: Decomposer

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  43. Question 43 (NEET 2013, Q133)

    Biodiversity and ConservationBotanyMedium
    Which one of the following is not used for ex situ plant conservation?
    1. Option A: Field gene banks
    2. Option B: Seed banks
    3. Option C: Shifting cultivation
    4. Option D: Botanical gardens

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  44. Question 44 (NEET 2013, Q134)

    Biodiversity and ConservationBotanyMedium
    Kyoto Protocol was endorsed at
    1. Option A: CoP-3
    2. Option B: CoP-5
    3. Option C: CoP-6
    4. Option D: CoP-4

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  45. Question 45 (NEET 2013, Q135)

    Biodiversity and ConservationBotanyEasy
    Which of the following represent maximum number of species among global biodiversity?
    1. Option A: Algae
    2. Option B: Lichens
    3. Option C: Fungi
    4. Option D: Mosses and Ferns

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  46. Question 46 (NEET 2013, Q136)

    Animal KingdomZoologyMedium
    Match the name of the animal (Column I) with one characteristic (Column II) and the phylum/class (Column III) to which it belongs.
    1. Option A: Option 1
    2. Option B: Option 2
    3. Option C: Option 3
    4. Option D: Option 4
    Show answer & explanation

    Correct answer: (A) Option 1

    Explanation

    Petromyzon (lamprey) is an ectoparasite and belongs to Cyclostomata.

  47. Question 47 (NEET 2013, Q137)

    Animal KingdomZoologyMedium
    Which of the following are correctly matched with respect to their taxonomic classification?
    1. Option A: Flying fish, cuttlefish, silverfish – Pisces
    2. Option B: Centipede, millipede, spider, scorpion – Insecta
    3. Option C: House fly, butterfly, tsetse fly, silverfish – Insecta
    4. Option D: Spiny anteater, sea urchin, sea cucumber – Echinodermata
    Show answer & explanation

    Correct answer: (C) House fly, butterfly, tsetse fly, silverfish – Insecta

    Explanation

    Housefly, butterfly, tsetse fly and silverfish all belong to class Insecta.

  48. Question 48 (NEET 2013, Q138)

    Animal KingdomZoologyEasy
    Which group of animals belong to the same phylum?
    1. Option A: Malaria parasite, Amoeba, Mosquito
    2. Option B: Earthworm, Pinworm, Tapeworm
    3. Option C: Prawn, Scorpion, Locusta
    4. Option D: Sponge, Sea anemone, Starfish
    Show answer & explanation

    Correct answer: (C) Prawn, Scorpion, Locusta

    Explanation

    Prawn, scorpion and Locusta belong to phylum Arthropoda.

  49. Question 49 (NEET 2013, Q139)

    Animal KingdomZoologyEasy
    One of the representatives of phylum Arthropoda is
    1. Option A: Cuttlefish
    2. Option B: Silverfish
    3. Option C: Pufferfish
    4. Option D: Flying fish
    Show answer & explanation

    Correct answer: (B) Silverfish

    Explanation

    Silverfish is an arthropod belonging to class Insecta.

  50. Question 50 (NEET 2013, Q140)

    Locomotion and MovementZoologyMedium
    The H-zone in skeletal muscle fibre is due to
    1. Option A: Absence of myofibrils in the central portion of A-band
    2. Option B: Central gap between myosin filaments in A-band
    3. Option C: Central gap between actin filaments extending through myosin filaments in the A-band
    4. Option D: Extension of myosin filaments in the central portion of A-band

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  51. Question 51 (NEET 2013, Q141)

    Structural Organisation in AnimalsZoologyMedium
    What external changes are visible after the last moult of a cockroach nymph?
    1. Option A: Mandibles become harder
    2. Option B: Anal cerci develop
    3. Option C: Both fore wings and hind wings develop
    4. Option D: Labium develops

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  52. Question 52 (NEET 2013, Q142)

    Cell: The Unit of LifeZoologyMedium
    The Golgi complex plays a major role
    1. Option A: In trapping light and transforming it into chemical energy
    2. Option B: In digesting proteins and carbohydrates
    3. Option C: As energy transferring organelles
    4. Option D: In post translational modification of proteins and glycosidation of lipids

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  53. Question 53 (NEET 2013, Q143)

    Cell: The Unit of LifeZoologyMedium
    Which one of the following organelle in the figure correctly matches with its function?
    1. Option A: Rough endoplasmic reticulum – formation of glycoproteins
    2. Option B: Golgi apparatus – protein synthesis
    3. Option C: Golgi apparatus – formation of glycolipids
    4. Option D: Rough endoplasmic reticulum – protein synthesis

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  54. Question 54 (NEET 2013, Q144)

    BiomoleculesZoologyEasy
    Macromolecule chitin is
    1. Option A: Nitrogen containing polysaccharide
    2. Option B: Phosphorus containing polysaccharide
    3. Option C: Sulphur containing polysaccharide
    4. Option D: Simple polysaccharide

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  55. Question 55 (NEET 2013, Q145)

    BiomoleculesZoologyEasy
    The essential chemical components of many coenzymes are
    1. Option A: Proteins
    2. Option B: Nucleic acids
    3. Option C: Carbohydrates
    4. Option D: Vitamins

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  56. Question 56 (NEET 2013, Q146)

    Cell Cycle and Cell DivisionZoologyHard
    A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics.
    1. Option A: Option 1
    2. Option B: Option 2
    3. Option C: Option 3
    4. Option D: Option 4

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  57. Question 57 (NEET 2013, Q147)

    Body Fluids and CirculationZoologyMedium
    Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.
    1. Option A: Option 1
    2. Option B: Option 2
    3. Option C: Option 3
    4. Option D: Option 4

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  58. Question 58 (NEET 2013, Q148)

    Human ReproductionZoologyMedium
    A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of
    1. Option A: Deficiency of iodine in diet
    2. Option B: Low secretion of growth hormone
    3. Option C: Cancer of the thyroid gland
    4. Option D: Over secretion of pars distalis

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  59. Question 59 (NEET 2013, Q149)

    Breathing and Exchange of GasesZoologyHard
    The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option which gives correct identification and main function and/or characteristic.
    1. Option A: A - trachea - long tube supported by complete cartilaginous rings for conducting inspired air
    2. Option B: B-pleural membrane - surround ribs on both sides to provide cushion against rubbing
    3. Option C: C-Alveoli - thin walled vascular bag like structures for exchange of gases
    4. Option D: D-Lower end of lungs - diaphragm pulls it down during inspiration

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  60. Question 60 (NEET 2013, Q150)

    Body Fluids and CirculationZoologyHard
    Figure shows schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function.
    1. Option A: A – Pulmonary vein – takes impure blood from body parts, PO2PO_2 = 60 mm Hg
    2. Option B: B – Pulmonary artery – takes blood from heart to lungs, PO2PO_2 = 90 mm Hg
    3. Option C: C – Vena Cava – takes blood from body parts to right auricle, PCO2PCO_2 = 45 mm Hg
    4. Option D: D – Dorsal aorta – takes blood from heart to body parts, PO2PO_2 = 95 mm Hg

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  61. Question 61 (NEET 2013, Q151)

    Body Fluids and CirculationZoologyMedium
    The diagram given here is the standard ECG of a normal person. The P-wave represents
    1. Option A: Contraction of both the atria
    2. Option B: Initiation of ventricular contraction
    3. Option C: Beginning of systole
    4. Option D: End of systole

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  62. Question 62 (NEET 2013, Q152)

    Excretory Products and Their EliminationZoologyHard
    Figure shows human urinary system with structures labelled A to D. Select option which correctly identifies them and gives their characteristics and/or functions.
    1. Option A: A – Adrenal gland – located at anterior part of kidney; secretes catecholamines that stimulate glycogen breakdown
    2. Option B: B – Pelvis – broad funnel shaped space inner to hilum directly connected to loops of Henle
    3. Option C: C – Medulla – inner zone of kidney and contains complete nephrons
    4. Option D: D – Cortex – outer part of kidney and does not contain any part of nephrons

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  63. Question 63 (NEET 2013, Q153)

    Locomotion and MovementZoologyMedium
    Select the correct statement with respect to locomotion in humans.
    1. Option A: A decreased level of progesterone causes osteoporosis in old people
    2. Option B: Accumulation of uric acid crystals in joints causes their inflammation
    3. Option C: The vertebral column has 10 thoracic vertebrae
    4. Option D: The joint between adjacent vertebrae is a fibrous joint

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  64. Question 64 (NEET 2013, Q154)

    Locomotion and MovementZoologyMedium
    The characteristics and an example of a synovial joint in humans is
    1. Option A: Option 1
    2. Option B: Option 2
    3. Option C: Option 3
    4. Option D: Option 4

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  65. Question 65 (NEET 2013, Q155)

    Neural Control and CoordinationZoologyHard
    A diagram showing axon terminal and synapse is given. Identify correctly at least two of A–D.
    1. Option A: A – Receptor; C – Synaptic vesicles
    2. Option B: B – Synaptic connection; D – K+K^+
    3. Option C: A – Neurotransmitter; B – Synaptic cleft
    4. Option D: C – Neurotransmitter; D – Ca+Ca^++^+

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  66. Question 66 (NEET 2013, Q156)

    Neural Control and CoordinationZoologyHard
    Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics.
    1. Option A: A – Retina – contains photoreceptors rods and cones
    2. Option B: B – Blind spot – has only a few rods and cones
    3. Option C: C – Aqueous chamber – reflects light which does not pass through lens
    4. Option D: D – Choroid – its anterior part forms ciliary body

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  67. Question 67 (NEET 2013, Q157)

    Chemical Coordination and IntegrationZoologyMedium
    Which of the following statement is correct in relation to the endocrine system?
    1. Option A: Adenohypophysis is under direct neural regulation of the hypothalamus
    2. Option B: Organs like gastrointestinal tract, heart, kidney and liver do not produce hormones
    3. Option C: Non-nutrient chemicals produced by the body in trace amount that act as intercellular messengers are known as hormones
    4. Option D: Releasing and inhibitory hormones are produced by the pituitary gland

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  68. Question 68 (NEET 2013, Q158)

    Chemical Coordination and IntegrationZoologyMedium
    Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom.
    1. Option A: Option 1
    2. Option B: Option 2
    3. Option C: Option 3
    4. Option D: Option 4

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  69. Question 69 (NEET 2013, Q159)

    Human ReproductionZoologyMedium
    What is the correct sequence of sperm formation?
    1. Option A: Spermatid, Spermatocyte, Spermatogonia, Spermatozoa
    2. Option B: Spermatogonia, Spermatocyte, Spermatozoa, Spermatid
    3. Option C: Spermatogonia, Spermatozoa, Spermatocyte, Spermatid
    4. Option D: Spermatogonia, Spermatocyte, Spermatid, Spermatozoa

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  70. Question 70 (NEET 2013, Q160)

    Human ReproductionZoologyEasy
    Menstrual flow occurs due to lack of
    1. Option A: Progesterone
    2. Option B: FSH
    3. Option C: Oxytocin
    4. Option D: Vasopressin

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  71. Question 71 (NEET 2013, Q161)

    Human ReproductionZoologyEasy
    Which one of the following is not the function of placenta?
    1. Option A: Facilitates supply of oxygen and nutrients to embryo
    2. Option B: Secretes estrogen
    3. Option C: Facilitates removal of carbon dioxide and waste material from embryo
    4. Option D: Secretes oxytocin during parturition

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  72. Question 72 (NEET 2013, Q162)

    Reproductive HealthZoologyEasy
    One of the legal methods of birth control is
    1. Option A: Abortion by taking an appropriate medicine
    2. Option B: By abstaining from coitus from day 10 to 17 of the menstrual cycle
    3. Option C: By having coitus at the time of day break
    4. Option D: By premature ejaculation during coitus

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  73. Question 73 (NEET 2013, Q163)

    Reproductive HealthZoologyMedium
    Which of the following cannot be detected in a developing foetus by amniocentesis?
    1. Option A: Klinefelter syndrome
    2. Option B: Sex of the foetus
    3. Option C: Down syndrome
    4. Option D: Jaundice

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  74. Question 74 (NEET 2013, Q164)

    Reproductive HealthZoologyMedium
    Artificial insemination means
    1. Option A: Transfer of sperms of a healthy donor to a test tube containing ova
    2. Option B: Transfer of sperms of husband to a test tube containing ova
    3. Option C: Artificial introduction of sperms of a healthy donor into the vagina
    4. Option D: Introduction of sperms of healthy donor directly into the ovary

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  75. Question 75 (NEET 2013, Q165)

    Principles of Inheritance and VariationZoologyMedium
    Which Mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents?
    1. Option A: Incomplete dominance
    2. Option B: Law of dominance
    3. Option C: Inheritance of one gene
    4. Option D: Co-dominance

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  76. Question 76 (NEET 2013, Q166)

    Principles of Inheritance and VariationZoologyMedium
    The incorrect statement with regard to Haemophilia is
    1. Option A: It is a sex-linked disease
    2. Option B: It is a recessive disease
    3. Option C: It is a dominant disease
    4. Option D: A single protein involved in clotting of blood is affected

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  77. Question 77 (NEET 2013, Q167)

    Principles of Inheritance and VariationZoologyHard
    If both parents are carriers for thalassemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
    1. Option A: No chance
    2. Option B: 50%
    3. Option C: 25%
    4. Option D: 100%

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  78. Question 78 (NEET 2013, Q168)

    Molecular Basis of InheritanceZoologyMedium
    The diagram shows an important concept in the central dogma of DNA. Fill in the blanks A to C correctly.
    1. Option A: A-Transcription, B-Replication, C-James Watson
    2. Option B: A-Translation, B-Transcription, C-Erwin Chargaff
    3. Option C: A-Transcription, B-Translation, C-Francis Crick
    4. Option D: A-Translation, B-Extension, C-Rosalind Franklin

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  79. Question 79 (NEET 2013, Q169)

    Molecular Basis of InheritanceZoologyHard
    Which enzyme/s will be produced in a cell in which there is a nonsense mutation in the lac Y gene?
    1. Option A: β-galactosidase
    2. Option B: Lactose permease
    3. Option C: Transacetylase
    4. Option D: Lactose permease and transacetylase

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  80. Question 80 (NEET 2013, Q170)

    EvolutionZoologyMedium
    According to Darwin, the organic evolution is due to
    1. Option A: Intraspecific competition
    2. Option B: Interspecific competition
    3. Option C: Competition within closely related species
    4. Option D: Reduced feeding efficiency in one species due to the presence of interfering species

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  81. Question 81 (NEET 2013, Q171)

    EvolutionZoologyMedium
    The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of
    1. Option A: Homologous organs that have evolved due to convergent evolution
    2. Option B: Homologous organs that have evolved due to divergent evolution
    3. Option C: Analogous organs that have evolved due to convergent evolution
    4. Option D: Analogous organs that have evolved due to divergent evolution

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  82. Question 82 (NEET 2013, Q172)

    Human Health and DiseaseZoologyEasy
    Infection of Ascaris usually occurs by
    1. Option A: Drinking water containing eggs of Ascaris
    2. Option B: Eating imperfectly cooked pork
    3. Option C: Tse-tse-fly
    4. Option D: Mosquito bite

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  83. Question 83 (NEET 2013, Q173)

    Human Health and DiseaseZoologyEasy
    The cell-mediated immunity inside the human body is carried out by
    1. Option A: T-lymphocytes
    2. Option B: B-lymphocytes
    3. Option C: Thrombocytes
    4. Option D: Erythrocytes

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  84. Question 84 (NEET 2013, Q174)

    Strategies For Enhancement In Food ProductionZoologyMedium
    In plant breeding programmes, the entire collection of plants/seeds having all the diverse alleles for all genes in a given crop is called
    1. Option A: Selection of superior recombinants
    2. Option B: Cross-hybridisation among selected parents
    3. Option C: Evaluation and selection of parents
    4. Option D: Germplasm collection
    Show answer & explanation

    Correct answer: (D) Germplasm collection

    Explanation

    The total collection of genetic variability of a crop is called germplasm collection.

  85. Question 85 (NEET 2013, Q175)

    Microbes in Human WelfareZoologyMedium
    During sewage treatment, biogas is produced which include
    1. Option A: Methane, hydrogen sulphide, carbon dioxide
    2. Option B: Methane, oxygen, hydrogen sulphide
    3. Option C: Hydrogen sulphide, methane, sulphur dioxide
    4. Option D: Hydrogen sulphide, nitrogen, methane

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  86. Question 86 (NEET 2013, Q176)

    Organisms and PopulationsZoologyMedium
    A biologist studied the population of rats in a barn. Average natality was 250, mortality 240, immigration 20 and emigration 30. The net increase in population is
    1. Option A: 10
    2. Option B: 15
    3. Option C: 05
    4. Option D: Zero

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  87. Question 87 (NEET 2013, Q177)

    EcosystemZoologyMedium
    Which one of the following processes during decomposition is correctly described?
    1. Option A: Fragmentation - Carried out by organisms such as earthworm
    2. Option B: Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate
    3. Option C: Catabolism - Last step in the decomposition under fully anaerobic condition
    4. Option D: Leaching - Water soluble inorganic nutrients rise to the top layers of soil

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  88. Question 88 (NEET 2013, Q178)

    Organisms and PopulationsZoologyMedium
    A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is
    1. Option A: Ectoparasitism
    2. Option B: Symbiosis
    3. Option C: Commensalism
    4. Option D: Amensalism

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  89. Question 89 (NEET 2013, Q179)

    Biodiversity and ConservationZoologyEasy
    Global warming can be controlled by
    1. Option A: Reducing deforestation, cutting down use of fossil fuel
    2. Option B: Reducing reforestation, increasing the use of fossil fuel
    3. Option C: Increasing deforestation, slowing down the growth of human population
    4. Option D: Increasing deforestation, reducing efficiency of energy usage

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  90. Question 90 (NEET 2013, Q180)

    Biodiversity and ConservationZoologyEasy
    The Air (Prevention and Control of Pollution) Act came into force in
    1. Option A: 1975
    2. Option B: 1981
    3. Option C: 1985
    4. Option D: 1990

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