AIPMT 2006 · Biology

AIPMT 2006 Biology Questions with Solutions

The AIPMT 2006 paper had 100 Biology questions from 29 chapters. By section: 61 Botany and 39 Zoology.

Principles of Inheritance and Variation had the most questions (11), followed by Biodiversity and Conservation with 9.

2 questions below have the answer and explanation free; the other 98 are in Premium.

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Chapter-wise: AIPMT 2006 Biology

How many questions each chapter had in AIPMT 2006. Open a chapter for its questions from every year.

  1. Principles of Inheritance and Variation· Botany11 Qs
  2. Biodiversity and Conservation· Botany9 Qs
  3. Human Health and Disease· Zoology6 Qs
  4. Plant Growth and Development· Botany6 Qs
  5. Animal Kingdom· Zoology5 Qs
  6. Chemical Coordination and Integration· Zoology5 Qs
  7. Evolution· Zoology5 Qs
  8. Molecular Basis of Inheritance· Botany5 Qs
  9. Morphology of Flowering Plants· Botany4 Qs
  10. Organisms and Populations· Botany4 Qs
  11. Photosynthesis in Higher Plants· Botany4 Qs
  12. Sexual Reproduction in Flowering Plants· Botany4 Qs
  13. Structural Organisation in Animals· Zoology4 Qs
  14. Biological Classification· Botany3 Qs
  15. Breathing and Exchange of Gases· Zoology3 Qs
  16. Cell: The Unit of Life· Botany3 Qs
  17. Biotechnology and Its Applications· Zoology2 Qs
  18. Biotechnology: Principles and Processes· Zoology2 Qs
  19. Excretory Products and Their Elimination· Zoology2 Qs
  20. Human Reproduction· Zoology2 Qs
  21. Plant Kingdom· Botany2 Qs
  22. Strategies For Enhancement In Food Production· Botany2 Qs
  23. Anatomy of Flowering Plants· Botany1 Q
  24. Biomolecules· Zoology1 Q
  25. Ecosystem· Botany1 Q
  26. Locomotion and Movement· Zoology1 Q
  27. Microbes in Human Welfare· Botany1 Q
  28. Neural Control and Coordination· Zoology1 Q
  29. Respiration in Plants· Botany1 Q

All 100 AIPMT 2006 Biology questions

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

  1. Question 1 (AIPMT 2006, Q101)

    Sexual Reproduction in Flowering PlantsBotanyMedium
    What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
    1. Option A: 16
    2. Option B: 24
    3. Option C: 32
    4. Option D: 8

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  2. Question 2 (AIPMT 2006, Q102)

    Morphology of Flowering PlantsBotanyMedium
    Pineapple (Ananas) fruit develops from:
    1. Option A: A unilocular polycarpellary flower
    2. Option B: A multipistillate syncarpous flower
    3. Option C: A cluster of compactly borne flowers on a common axis
    4. Option D: A multilocular monocarpellary flower

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  3. Question 3 (AIPMT 2006, Q103)

    Biotechnology and Its ApplicationsZoologyEasy
    Golden rice is a promising transgenic crop. When released for cultivation, it will help in:
    1. Option A: Alleviation of vitamin-A deficiency
    2. Option B: Pest resistance
    3. Option C: Herbicide tolerance
    4. Option D: Producing a petrol-like fuel from rice

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  4. Question 4 (AIPMT 2006, Q104)

    Plant Growth and DevelopmentBotanyEasy
    Parthenocarpic tomato fruits can be produced by:
    1. Option A: Removing androecium of flowers before pollen grains are released
    2. Option B: Treating the plants with low concentrations of gibberellic acid and auxins
    3. Option C: Raising the plants from vernalized seeds
    4. Option D: Treating the plants with phenylmercuric acetate

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  5. Question 5 (AIPMT 2006, Q105)

    Plant Growth and DevelopmentBotanyEasy
    How does pruning help in making the hedge dense?
    1. Option A: It induces the differentiation of new shoots from the rootstock
    2. Option B: It frees axillary buds from apical dominance
    3. Option C: The apical shoot grows faster after pruning
    4. Option D: It releases wound hormones

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  6. Question 6 (AIPMT 2006, Q106)

    Biodiversity and ConservationBotanyEasy
    The 'blue baby' syndrome results from:
    1. Option A: Excess chloride
    2. Option B: Methaemoglobin
    3. Option C: Excess of dissolved oxygen
    4. Option D: Excess of TDS (Total Dissolved Solids)

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  7. Question 7 (AIPMT 2006, Q107)

    Organisms and PopulationsBotanyEasy
    Praying mantis is a good example of:
    1. Option A: Mullerian mimicry
    2. Option B: Warning colouration
    3. Option C: Social insects
    4. Option D: Camouflage

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  8. Question 8 (AIPMT 2006, Q108)

    Chemical Coordination and IntegrationZoologyMedium
    Which one of the following statements is correct?
    1. Option A: Neurons regulate endocrine activity, but not vice versa
    2. Option B: Endocrine glands regulate neural activity and nervous system regulates endocrine glands
    3. Option C: Neither hormones control neural activity nor the neurons control endocrine activity
    4. Option D: Endocrine glands regulate neural activity, but not vice versa

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  9. Question 9 (AIPMT 2006, Q109)

    Human Health and DiseaseZoologyMedium
    Examination of blood of a person suspected of having anaemia shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?
    1. Option A: Thiamine
    2. Option B: Folic acid and cobalamine
    3. Option C: Riboflavin
    4. Option D: Iron compounds

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  10. Question 10 (AIPMT 2006, Q110)

    Plant Growth and DevelopmentBotanyMedium
    Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
    1. Option A: Frequent irrigation of the crop
    2. Option B: Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
    3. Option C: Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid
    4. Option D: Application of iron and magnesium to promote synthesis of chlorophyll

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  11. Question 11 (AIPMT 2006, Q111)

    Morphology of Flowering PlantsBotanyEasy
    In which of the following fruits is the edible part the aril?
    1. Option A: Custard apple
    2. Option B: Pomegranate
    3. Option C: Orange
    4. Option D: Litchi

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  12. Question 12 (AIPMT 2006, Q112)

    EvolutionZoologyMedium
    Which one of the following amino acids was not found to be synthesized in Miller's experiment?
    1. Option A: Glycine
    2. Option B: Aspartic acid
    3. Option C: Glutamic acid
    4. Option D: Alanine

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  13. Question 13 (AIPMT 2006, Q113)

    Biodiversity and ConservationBotanyEasy
    Crop plants grown in monoculture are:
    1. Option A: Low in yield
    2. Option B: Free from intraspecific competition
    3. Option C: Characterised by poor root system
    4. Option D: Highly prone to pests

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  14. Question 14 (AIPMT 2006, Q114)

    Biodiversity and ConservationBotanyEasy
    Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
    1. Option A: 1986
    2. Option B: 1987
    3. Option C: 1988
    4. Option D: 1985

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  15. Question 15 (AIPMT 2006, Q115)

    Organisms and PopulationsBotanyEasy
    The formula for exponential population growth is:
    1. Option A: dt/dN = rN
    2. Option B: dN/(rN) = dt
    3. Option C: rN/dN = dt
    4. Option D: dN/dt = rN

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  16. Question 16 (AIPMT 2006, Q116)

    EcosystemBotanyEasy
    Which one of the following is not used for construction of ecological pyramids?
    1. Option A: Dry weight
    2. Option B: Number of individuals
    3. Option C: Rate of energy flow
    4. Option D: Fresh weight

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  17. Question 17 (AIPMT 2006, Q117)

    Organisms and PopulationsBotanyMedium
    Niche overlap indicates:
    1. Option A: Active co-operation between two species
    2. Option B: Two different parasites on the same host
    3. Option C: Sharing of one or more resources between the two species
    4. Option D: Mutualism between two species

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  18. Question 18 (AIPMT 2006, Q118)

    Photosynthesis in Higher PlantsBotanyMedium
    In photosystem-I, the first electron acceptor is:
    1. Option A: Ferredoxin
    2. Option B: Cytochrome
    3. Option C: Plastocyanin
    4. Option D: An iron-sulphur protein

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  19. Question 19 (AIPMT 2006, Q119)

    Plant Growth and DevelopmentBotanyEasy
    Treatment of seed at low temperature under moist conditions to break its dormancy is called:
    1. Option A: Scarification
    2. Option B: Vernalization
    3. Option C: Chelation
    4. Option D: Stratification

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  20. Question 20 (AIPMT 2006, Q120)

    Principles of Inheritance and VariationBotanyEasy
    Which one of the following is the most suitable medium for culture of Drosophila melanogaster?
    1. Option A: Moist bread
    2. Option B: Agar agar
    3. Option C: Ripe banana
    4. Option D: Cow dung

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  21. Question 21 (AIPMT 2006, Q121)

    Biodiversity and ConservationBotanyEasy
    Which one of the following is not included under in situ conservation?
    1. Option A: Sanctuary
    2. Option B: Botanical garden
    3. Option C: Biosphere reserve
    4. Option D: National park

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  22. Question 22 (AIPMT 2006, Q122)

    Molecular Basis of InheritanceBotanyMedium
    Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?
    1. Option A: Erythromycin
    2. Option B: Neomycin
    3. Option C: Streptomycin
    4. Option D: Tetracycline

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  23. Question 23 (AIPMT 2006, Q123)

    Principles of Inheritance and VariationBotanyEasy
    Phenotype of an organism is the result of:
    1. Option A: Mutations and linkages
    2. Option B: Cytoplasmic effects and nutrition
    3. Option C: Environmental changes and sexual dimorphism
    4. Option D: Genotype and environment interactions

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  24. Question 24 (AIPMT 2006, Q124)

    Biodiversity and ConservationBotanyMedium
    Photochemical smog pollution does not contain:
    1. Option A: Ozone
    2. Option B: Nitrogen dioxide
    3. Option C: Carbon dioxide
    4. Option D: PAN (Peroxy Acyl Nitrate)

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  25. Question 25 (AIPMT 2006, Q125)

    Plant Growth and DevelopmentBotanyEasy
    Moss peat is used as a packing material for sending flowers and live plants to distant places because:
    1. Option A: It is easily available
    2. Option B: It is hygroscopic
    3. Option C: It reduces transpiration
    4. Option D: It serves as a disinfectant

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  26. Question 26 (AIPMT 2006, Q126)

    Anatomy of Flowering PlantsBotanyMedium
    A common structural feature of vessel elements and sieve tube elements is:
    1. Option A: Thick secondary walls
    2. Option B: Pores on lateral walls
    3. Option C: Presence of P-protein
    4. Option D: Enucleate condition

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  27. Question 27 (AIPMT 2006, Q127)

    Biological ClassificationBotanyEasy
    The thalloid body of a slime mould (Myxomycetes) is known as:
    1. Option A: Protonema
    2. Option B: Plasmodium
    3. Option C: Fruiting body
    4. Option D: Mycelium

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  28. Question 28 (AIPMT 2006, Q128)

    Principles of Inheritance and VariationBotanyMedium
    In which mode of inheritance do you expect more maternal influence among the offspring?
    1. Option A: Autosomal
    2. Option B: Cytoplasmic
    3. Option C: Y-linked
    4. Option D: X-linked

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  29. Question 29 (AIPMT 2006, Q129)

    Morphology of Flowering PlantsBotanyEasy
    What type of placentation is seen in sweet pea?
    1. Option A: Basal
    2. Option B: Axile
    3. Option C: Free central
    4. Option D: Marginal

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  30. Question 30 (AIPMT 2006, Q130)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    Long filamentous threads protruding at the end of a young cob of maize are:
    1. Option A: Anthers
    2. Option B: Styles
    3. Option C: Ovaries
    4. Option D: Hairs

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  31. Question 31 (AIPMT 2006, Q131)

    Plant KingdomBotanyMedium
    Conifers differ from grasses in the:
    1. Option A: Production of seeds from ovules
    2. Option B: Lack of xylem tracheids
    3. Option C: Absence of pollen tubes
    4. Option D: Formation of endosperm before fertilization

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  32. Question 32 (AIPMT 2006, Q132)

    Principles of Inheritance and VariationBotanyEasy
    How many different kinds of gametes will be produced by a plant having the genotype AABbCC?
    1. Option A: Three
    2. Option B: Four
    3. Option C: Nine
    4. Option D: Two

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  33. Question 33 (AIPMT 2006, Q133)

    Strategies For Enhancement In Food ProductionBotanyEasy
    In maize, hybrid vigour is exploited by:
    1. Option A: Bombarding the protoplast with DNA
    2. Option B: Crossing of two inbred parental lines
    3. Option C: Harvesting seeds from the most productive plants
    4. Option D: Inducing mutations
    Show answer & explanation

    Correct answer: (B) Crossing of two inbred parental lines

    Explanation

    Hybrid vigour or heterosis in maize is obtained by crossing two genetically pure inbred parental lines, producing a highly vigorous F₁ hybrid. Hence option (B) is correct.

  34. Question 34 (AIPMT 2006, Q134)

    Cell: The Unit of LifeBotanyMedium
    Which of the following statements regarding mitochondrial membrane is not correct?
    1. Option A: The outer membrane is permeable to all kinds of molecules
    2. Option B: The enzymes of the electron transfer chain are embedded in the outer membrane
    3. Option C: The inner membrane is highly convoluted forming a series of infoldings
    4. Option D: The outer membrane resembles a sieve

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  35. Question 35 (AIPMT 2006, Q135)

    Molecular Basis of InheritanceBotanyEasy
    Amino acid sequence in protein synthesis is decided by the sequence of:
    1. Option A: t-RNA
    2. Option B: m-RNA
    3. Option C: c-DNA
    4. Option D: r-RNA

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  36. Question 36 (AIPMT 2006, Q136)

    Respiration in PlantsBotanyMedium
    How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
    1. Option A: Two
    2. Option B: Thirty
    3. Option C: Fifty seven
    4. Option D: One

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  37. Question 37 (AIPMT 2006, Q137)

    BiomoleculesZoologyEasy
    An organic substance bound to an enzyme and essential for its activity is called:
    1. Option A: Coenzyme
    2. Option B: Holoenzyme
    3. Option C: Apoenzyme
    4. Option D: Isoenzyme

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  38. Question 38 (AIPMT 2006, Q138)

    Structural Organisation in AnimalsZoologyEasy
    Bowman's glands are found in:
    1. Option A: Olfactory epithelium
    2. Option B: External auditory canal
    3. Option C: Cortical nephrons only
    4. Option D: Juxtamedullary nephrons

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  39. Question 39 (AIPMT 2006, Q139)

    Human Health and DiseaseZoologyEasy
    The bacterium (Clostridium botulinum) that causes botulism is:
    1. Option A: A facultative anaerobe
    2. Option B: An obligate anaerobe
    3. Option C: A facultative aerobe
    4. Option D: An obligate aerobe

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  40. Question 40 (AIPMT 2006, Q140)

    Biodiversity and ConservationBotanyMedium
    Which one of the following is the correctly matched pair of an endangered animal and a National Park?
    1. Option A: Lion — Corbett National Park
    2. Option B: Rhinoceros — Kaziranga National Park
    3. Option C: Wild ass — Dudhwa National Park
    4. Option D: Great Indian bustard — Keoladeo National Park

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  41. Question 41 (AIPMT 2006, Q141)

    Human Health and DiseaseZoologyMedium
    A person showing unpredictable moods, outbursts of emotion, quarrelsome behaviour and conflicts with others is suffering from:
    1. Option A: Schizophrenia
    2. Option B: Borderline personality disorder (BPD)
    3. Option C: Mood disorders
    4. Option D: Addictive disorders

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  42. Question 42 (AIPMT 2006, Q142)

    Photosynthesis in Higher PlantsBotanyEasy
    Sulphur is an important nutrient for optimum growth and productivity in:
    1. Option A: Pulse crops
    2. Option B: Cereals
    3. Option C: Fibre crops
    4. Option D: Oilseed crops

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  43. Question 43 (AIPMT 2006, Q143)

    Morphology of Flowering PlantsBotanyMedium
    Pentamerous, actinomorphic flowers, bicarpellary ovary with oblique septa, and fruit a capsule or berry, are characteristic features of:
    1. Option A: Asteraceae
    2. Option B: Brassicaceae
    3. Option C: Solanaceae
    4. Option D: Liliaceae

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  44. Question 44 (AIPMT 2006, Q144)

    Plant KingdomBotanyMedium
    In a moss the sporophyte:
    1. Option A: Is partially parasitic on the gametophyte
    2. Option B: Produces gametes that give rise to the gametophyte
    3. Option C: Arises from a spore produced from the gametophyte
    4. Option D: Manufactures food for itself, as well as for the gametophyte

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  45. Question 45 (AIPMT 2006, Q145)

    Microbes in Human WelfareBotanyEasy
    Curing of tea leaves is brought about by the activity of:
    1. Option A: Bacteria
    2. Option B: Mycorrhiza
    3. Option C: Viruses
    4. Option D: Fungi

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  46. Question 46 (AIPMT 2006, Q146)

    Breathing and Exchange of GasesZoologyEasy
    People living at sea level have around 5 million RBC per cubic millimetre of blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude:
    1. Option A: People get pollution-free air to breathe and more oxygen is available
    2. Option B: Atmospheric O₂ level is less and hence more RBCs are needed to absorb the required amount of O₂ to survive
    3. Option C: There is more UV radiation which enhances RBC production
    4. Option D: People eat more nutritive food, therefore more RBCs are formed

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  47. Question 47 (AIPMT 2006, Q147)

    EvolutionZoologyEasy
    An important evidence in favour of organic evolution is the occurrence of:
    1. Option A: Homologous and vestigial organs
    2. Option B: Analogous and vestigial organs
    3. Option C: Homologous organs only
    4. Option D: Homologous and analogous organs

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  48. Question 48 (AIPMT 2006, Q148)

    EvolutionZoologyEasy
    Which one of the following is not a living fossil?
    1. Option A: King crab
    2. Option B: Sphenodon
    3. Option C: Archaeopteryx
    4. Option D: Peripatus

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  49. Question 49 (AIPMT 2006, Q149)

    Organisms and PopulationsBotanyEasy
    Annual migration does not occur in the case of:
    1. Option A: Salmon
    2. Option B: Siberian crane
    3. Option C: Salamander
    4. Option D: Arctic tern

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  50. Question 50 (AIPMT 2006, Q150)

    Cell: The Unit of LifeBotanyMedium
    A major breakthrough in the studies of cells came with the development of electron microscope. This is because:
    1. Option A: The resolution power of the electron microscope is much higher than that of the light microscope
    2. Option B: The resolving power of the electron microscope is 200–350 nm as compared to 0.1–0.2 nm for the light microscope
    3. Option C: Electron beam can pass through thick materials, whereas light microscopy requires thin sections
    4. Option D: The electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons

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  51. Question 51 (AIPMT 2006, Q151)

    Animal KingdomZoologyMedium
    Which one of the following is a matching set of a phylum and its three examples?
    1. Option A: Cnidaria — Bonellia, Physalia, Aurelia
    2. Option B: Platyhelminthes — Planaria, Schistosoma, Enterobius
    3. Option C: Mollusca — Loligo, Teredo, Octopus
    4. Option D: Porifera — Spongilla, Euplectella, Pennatula

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  52. Question 52 (AIPMT 2006, Q152)

    Animal KingdomZoologyEasy
    Metameric segmentation is the characteristic of:
    1. Option A: Platyhelminthes and Arthropoda
    2. Option B: Echinodermata and Annelida
    3. Option C: Annelida and Arthropoda
    4. Option D: Mollusca and Chordata

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  53. Question 53 (AIPMT 2006, Q153)

    Biodiversity and ConservationBotanyMedium
    Which of the following pairs of an animal and a plant represents endangered organisms in India?
    1. Option A: Bentinckia nicobarica and red panda
    2. Option B: Tamarind and rhesus monkey
    3. Option C: Cinchona and leopard
    4. Option D: Banyan and black buck

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  54. Question 54 (AIPMT 2006, Q154)

    EvolutionZoologyMedium
    Jurassic period of the Mesozoic era is characterised by:
    1. Option A: Gymnosperms are dominant plants and first birds appear
    2. Option B: Radiation of reptiles and origin of mammal-like reptiles
    3. Option C: Dinosaurs become extinct and angiosperms appear
    4. Option D: Flowering plants and first dinosaurs appear

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  55. Question 55 (AIPMT 2006, Q155)

    Biological ClassificationBotanyMedium
    What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?
    1. Option A: These are all unicellular protists
    2. Option B: They have flagella
    3. Option C: They produce spores
    4. Option D: These are all parasites

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  56. Question 56 (AIPMT 2006, Q156)

    Cell: The Unit of LifeBotanyMedium
    Which of the following statements regarding cilia is not correct?
    1. Option A: The organized beating of cilia is controlled by fluxes of Ca²⁺ across the membrane
    2. Option B: Cilia are hair-like cellular appendages
    3. Option C: Microtubules of cilia are composed of tubulin
    4. Option D: Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules

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  57. Question 57 (AIPMT 2006, Q157)

    Biotechnology: Principles and ProcessesZoologyEasy
    Microbes found to be very useful in genetic engineering are:
    1. Option A: Escherichia coli and Agrobacterium tumefaciens
    2. Option B: Vibrio cholerae and a tailed bacteriophage
    3. Option C: Diplococcus sp. and Pseudomonas sp.
    4. Option D: Crown gall bacterium and Caenorhabditis elegans

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  58. Question 58 (AIPMT 2006, Q158)

    Biological ClassificationBotanyMedium
    Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread? A. Temperature of about 25°C B. Temperature of about 5°C C. Relative humidity of about 5% D. Relative humidity of about 95% E. A shady place F. A brightly illuminated place Choose the answer from the following options :
    1. Option A: A, C and E only
    2. Option B: A, D and E only
    3. Option C: B, D and E only
    4. Option D: B, C and F only

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  59. Question 59 (AIPMT 2006, Q159)

    EvolutionZoologyEasy
    Evolutionary history of an organism is known as:
    1. Option A: Phylogeny
    2. Option B: Ancestry
    3. Option C: Paleontology
    4. Option D: Ontogeny

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  60. Question 60 (AIPMT 2006, Q160)

    Biodiversity and ConservationBotanyEasy
    Which of the following is considered a hot-spot of biodiversity in India?
    1. Option A: Western Ghats
    2. Option B: Indo-Gangetic plain
    3. Option C: Eastern Ghats
    4. Option D: Aravalli hills

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  61. Question 61 (AIPMT 2006, Q161)

    Photosynthesis in Higher PlantsBotanyMedium
    During photorespiration the oxygen consuming reaction(s) occur in:
    1. Option A: Stroma of chloroplasts and mitochondria
    2. Option B: Stroma of chloroplasts and peroxisomes
    3. Option C: Grana of chloroplasts and peroxisomes
    4. Option D: Stroma of chloroplasts

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  62. Question 62 (AIPMT 2006, Q162)

    Principles of Inheritance and VariationBotanyEasy
    Which one of the following is an example of polygenic inheritance?
    1. Option A: Flower colour in Mirabilis jalapa
    2. Option B: Production of male honey bee
    3. Option C: Pod shape in garden pea
    4. Option D: Skin colour in humans

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  63. Question 63 (AIPMT 2006, Q163)

    Neural Control and CoordinationZoologyEasy
    Which one of the following does not act as a neurotransmitter?
    1. Option A: Acetylcholine
    2. Option B: Epinephrine
    3. Option C: Nor epinephrine
    4. Option D: Cortisone

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  64. Question 64 (AIPMT 2006, Q164)

    Human ReproductionZoologyEasy
    Sertoli cells are regulated by the pituitary hormone known as:
    1. Option A: FSH
    2. Option B: GH
    3. Option C: Prolactin
    4. Option D: LH

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  65. Question 65 (AIPMT 2006, Q165)

    Chemical Coordination and IntegrationZoologyEasy
    A steroid hormone which regulates glucose metabolism is:
    1. Option A: Cortisol
    2. Option B: Corticosterone
    3. Option C: 11-deoxycorticosterone
    4. Option D: Cortisone

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  66. Question 66 (AIPMT 2006, Q166)

    Locomotion and MovementZoologyEasy
    The contractile protein of skeletal muscle involving ATPase activity is:
    1. Option A: Tropomyosin
    2. Option B: Myosin
    3. Option C: α-actinin
    4. Option D: Troponin

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  67. Question 67 (AIPMT 2006, Q167)

    Chemical Coordination and IntegrationZoologyMedium
    Which one of the following is not a second messenger in hormone action?
    1. Option A: cGMP
    2. Option B: Calcium
    3. Option C: Sodium
    4. Option D: cAMP

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  68. Question 68 (AIPMT 2006, Q168)

    Principles of Inheritance and VariationBotanyMedium
    In Mendel's experiments with garden pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F₂ generation of the cross RRYY × rryy?
    1. Option A: Only round seeds with green cotyledons
    2. Option B: Only wrinkled seeds with yellow cotyledons
    3. Option C: Only wrinkled seeds with green cotyledons
    4. Option D: Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

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  69. Question 69 (AIPMT 2006, Q169)

    Molecular Basis of InheritanceBotanyEasy
    One gene – one enzyme hypothesis was postulated by:
    1. Option A: R. Franklin
    2. Option B: Hershey and Chase
    3. Option C: A. Garrod
    4. Option D: Beadle and Tatum

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  70. Question 70 (AIPMT 2006, Q170)

    Molecular Basis of InheritanceBotanyEasy
    One turn of the helix in a B-form DNA is approximately:
    1. Option A: 20 nm
    2. Option B: 0.34 nm
    3. Option C: 3.4 nm
    4. Option D: 2 nm

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  71. Question 71 (AIPMT 2006, Q171)

    Principles of Inheritance and VariationBotanyEasy
    Test cross involves:
    1. Option A: Crossing between two genotypes with recessive trait
    2. Option B: Crossing between two F₁ hybrids
    3. Option C: Crossing the F₁ hybrid with a double recessive genotype
    4. Option D: Crossing between two genotypes with dominant trait

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  72. Question 72 (AIPMT 2006, Q172)

    Molecular Basis of InheritanceBotanyMedium
    Antiparallel strands of a DNA molecule means that:
    1. Option A: One strand turns anti-clockwise
    2. Option B: The phosphate groups of two DNA strands, at their ends, share the same position
    3. Option C: The phosphate groups at the start of two DNA strands are in opposite position (pole)
    4. Option D: One strand turns clockwise

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  73. Question 73 (AIPMT 2006, Q173)

    Structural Organisation in AnimalsZoologyEasy
    Areolar connective tissue joins:
    1. Option A: Fat body with muscles
    2. Option B: Integument with muscles
    3. Option C: Bones with muscles
    4. Option D: Bones with bones

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  74. Question 74 (AIPMT 2006, Q174)

    Structural Organisation in AnimalsZoologyEasy
    Mast cells secrete:
    1. Option A: Hippurin
    2. Option B: Myoglobin
    3. Option C: Histamine
    4. Option D: Haemoglobin

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  75. Question 75 (AIPMT 2006, Q175)

    Principles of Inheritance and VariationBotanyMedium
    If a colourblind woman marries a normal-visioned man, their sons will be:
    1. Option A: All normal visioned
    2. Option B: One-half colourblind and one-half normal
    3. Option C: Three-fourths colourblind and one-fourth normal
    4. Option D: All colourblind

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  76. Question 76 (AIPMT 2006, Q176)

    Principles of Inheritance and VariationBotanyEasy
    Cri-du-chat syndrome in humans is caused by:
    1. Option A: Fertilization of an XX egg by a normal Y-bearing sperm
    2. Option B: Loss of half of the short arm of chromosome 5
    3. Option C: Loss of half of the long arm of chromosome 5
    4. Option D: Trisomy of 21st chromosome

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  77. Question 77 (AIPMT 2006, Q177)

    Biotechnology: Principles and ProcessesZoologyEasy
    Restriction endonuclease:
    1. Option A: Cuts the DNA molecule randomly
    2. Option B: Cuts the DNA molecule at specific sites
    3. Option C: Restricts the synthesis of DNA inside the nucleus
    4. Option D: Synthesizes DNA

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  78. Question 78 (AIPMT 2006, Q178)

    Human Health and DiseaseZoologyEasy
    Antibodies in our body are complex:
    1. Option A: Lipoproteins
    2. Option B: Steroids
    3. Option C: Prostaglandins
    4. Option D: Glycoproteins

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  79. Question 79 (AIPMT 2006, Q179)

    Biodiversity and ConservationBotanyMedium
    Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal wastewater into natural surface water is:
    1. Option A: < 3.0 ppm
    2. Option B: < 10 ppm
    3. Option C: < 100 ppm
    4. Option D: < 30 ppm

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  80. Question 80 (AIPMT 2006, Q180)

    Excretory Products and Their EliminationZoologyMedium
    Earthworms are:
    1. Option A: Ureotelic when plenty of water is available
    2. Option B: Uricotelic when plenty of water is available
    3. Option C: Uricotelic under conditions of water scarcity
    4. Option D: Ammonotelic when plenty of water is available

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  81. Question 81 (AIPMT 2006, Q181)

    Chemical Coordination and IntegrationZoologyEasy
    Which of the following is an accumulation and release centre of neurohormones?
    1. Option A: Posterior pituitary lobe
    2. Option B: Intermediate lobe of the pituitary
    3. Option C: Hypothalamus
    4. Option D: Anterior pituitary lobe

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  82. Question 82 (AIPMT 2006, Q182)

    Human ReproductionZoologyEasy
    Withdrawal of which of the following hormones is the immediate cause of menstruation?
    1. Option A: Estrogens
    2. Option B: FSH
    3. Option C: FSH-RH
    4. Option D: Progesterone

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  83. Question 83 (AIPMT 2006, Q183)

    Breathing and Exchange of GasesZoologyMedium
    Which one of the following statements is incorrect?
    1. Option A: The residual air in lungs slightly decreases the efficiency of respiration in mammals
    2. Option B: The presence of non-respiratory air sacs increases the efficiency of respiration in birds
    3. Option C: In insects, circulating body fluids serve to distribute oxygen to tissues
    4. Option D: The principle of countercurrent flow facilitates efficient respiration in gills of fishes

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  84. Question 84 (AIPMT 2006, Q184)

    Structural Organisation in AnimalsZoologyEasy
    Which one of the following has an open circulatory system?
    1. Option A: Pheretima
    2. Option B: Periplaneta
    3. Option C: Hirudinaria
    4. Option D: Octopus

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  85. Question 85 (AIPMT 2006, Q185)

    Chemical Coordination and IntegrationZoologyEasy
    Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?
    1. Option A: ACTH
    2. Option B: Insulin
    3. Option C: Adrenalin
    4. Option D: Glucagon

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  86. Question 86 (AIPMT 2006, Q186)

    Human Health and DiseaseZoologyEasy
    The causative agent of mad-cow disease is a:
    1. Option A: Bacterium
    2. Option B: Prion
    3. Option C: Worm
    4. Option D: Virus

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  87. Question 87 (AIPMT 2006, Q187)

    Photosynthesis in Higher PlantsBotanyMedium
    The translocation of organic solutes in sieve tube members is supported by:
    1. Option A: Root pressure and transpiration pull
    2. Option B: P-proteins
    3. Option C: Mass flow involving a carrier and ATP
    4. Option D: Cytoplasmic streaming

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  88. Question 88 (AIPMT 2006, Q188)

    Animal KingdomZoologyMedium
    Biradial symmetry and lack of cnidoblasts are the characteristics of:
    1. Option A: Starfish and sea anemone
    2. Option B: Ctenoplana and Beroe
    3. Option C: Aurelia and Paramecium
    4. Option D: Hydra and starfish

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  89. Question 89 (AIPMT 2006, Q189)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    The arrangement of the nuclei in a normal embryo sac in dicot plants is:
    1. Option A: 2 + 4 + 2
    2. Option B: 3 + 2 + 3
    3. Option C: 2 + 3 + 3
    4. Option D: 3 + 3 + 2

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  90. Question 90 (AIPMT 2006, Q190)

    Plant Growth and DevelopmentBotanyMedium
    An enzyme that can stimulate germination of barley seeds is:
    1. Option A: α-amylase
    2. Option B: Lipase
    3. Option C: Protease
    4. Option D: Invertase

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  91. Question 91 (AIPMT 2006, Q191)

    Sexual Reproduction in Flowering PlantsBotanyEasy
    In a cereal grain the single cotyledon of embryo is represented by:
    1. Option A: Coleorhiza
    2. Option B: Scutellum
    3. Option C: Prophyll
    4. Option D: Coleoptile

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  92. Question 92 (AIPMT 2006, Q192)

    Breathing and Exchange of GasesZoologyEasy
    The majority of carbon dioxide produced by our body cells is transported to the lungs:
    1. Option A: Dissolved in the blood
    2. Option B: As bicarbonates
    3. Option C: As carbonates
    4. Option D: Attached to haemoglobin

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  93. Question 93 (AIPMT 2006, Q193)

    Strategies For Enhancement In Food ProductionBotanyEasy
    Triticale, the first man-made cereal crop, has been obtained by crossing wheat with:
    1. Option A: Rye
    2. Option B: Pearl millet
    3. Option C: Sugarcane
    4. Option D: Barley
    Show answer & explanation

    Correct answer: (A) Rye

    Explanation

    Triticale is a hybrid obtained by crossing wheat (Triticum) with rye (Secale). Hence option (A) is correct.

  94. Question 94 (AIPMT 2006, Q194)

    Biotechnology and Its ApplicationsZoologyEasy
    In order to obtain virus-free plants through tissue culture the best method is:
    1. Option A: Protoplast culture
    2. Option B: Embryo rescue
    3. Option C: Anther culture
    4. Option D: Meristem culture

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  95. Question 95 (AIPMT 2006, Q195)

    Human Health and DiseaseZoologyEasy
    HIV that causes AIDS first starts destroying:
    1. Option A: B-lymphocytes
    2. Option B: Leucocytes
    3. Option C: Thrombocytes
    4. Option D: Helper T-lymphocytes

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  96. Question 96 (AIPMT 2006, Q196)

    Animal KingdomZoologyMedium
    In which one of the following sets of animals do all the four give birth to young ones?
    1. Option A: Lion, bat, whale, ostrich
    2. Option B: Platypus, penguin, bat, hippopotamus
    3. Option C: Shrew, bat, cat, kiwi
    4. Option D: Kangaroo, hedgehog, dolphin, loris

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  97. Question 97 (AIPMT 2006, Q197)

    Principles of Inheritance and VariationBotanyMedium
    Sickle cell anaemia has not been eliminated from the African population because:
    1. Option A: It is controlled by recessive genes
    2. Option B: It is not a fatal disease
    3. Option C: It provides immunity against malaria
    4. Option D: It is controlled by dominant genes

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  98. Question 98 (AIPMT 2006, Q198)

    Animal KingdomZoologyEasy
    Two common characters found in centipede, cockroach and crab are:
    1. Option A: Compound eyes and anal cerci
    2. Option B: Jointed legs and chitinous exoskeleton
    3. Option C: Green gland and tracheae
    4. Option D: Book lungs and antennae

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  99. Question 99 (AIPMT 2006, Q199)

    Principles of Inheritance and VariationBotanyEasy
    Both sickle cell anaemia and Huntington's chorea are:
    1. Option A: Bacteria-related diseases
    2. Option B: Congenital disorders
    3. Option C: Pollutant-induced disorders
    4. Option D: Virus-related diseases

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  100. Question 100 (AIPMT 2006, Q200)

    Excretory Products and Their EliminationZoologyMedium
    Angiotensinogen is a protein produced and secreted by:
    1. Option A: Macula densa cells
    2. Option B: Endothelial cells (cells lining the blood vessels)
    3. Option C: Liver cells
    4. Option D: Juxtaglomerular (JG) cells

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