AIPMT 2011 · Biology

AIPMT 2011 Biology Questions with Solutions

The AIPMT 2011 paper had 61 Biology questions from 28 chapters. By section: 35 Botany and 26 Zoology.

Structural Organisation in Animals had the most questions (5), followed by Photosynthesis in Higher Plants with 4.

3 questions below have the answer and explanation free; the other 58 are in Premium.

Practise AIPMT 2011 Biology free

Biology questions: 61
Chapters covered: 28
Solved free here: 3 of 61
Easy / Medium / Hard: 27 / 28 / 6

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

Chapter-wise: AIPMT 2011 Biology

How many questions each chapter had in AIPMT 2011. Open a chapter for its questions from every year.

All 61 AIPMT 2011 Biology questions

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

Question 1 (AIPMT 2011, Q1)
BiomoleculesZoologyEasy
Which of the following is not a fat soluble vitamin?
1. Option A: Vitamin B complex
2. Option B: Vitamin D
3. Option C: Vitamin E
4. Option D: Vitamin A
The answer and explanation for this question are in NEET MIND Premium.
Question 2 (AIPMT 2011, Q2)
BiomoleculesZoologyMedium
Which of the statements about "Denaturation" given below are correct? Statements: (a) Denaturation of proteins causes loss of secondary and tertiary structures of the protein. (b) Denaturation leads to the conversion of double strand of DNA into single strand. (c) Denaturation affects primary structure which gets distorted.
1. Option A: (b) and (c)
2. Option B: (a) and (c)
3. Option C: (a) and (b)
4. Option D: (a), (b) and (c)
The answer and explanation for this question are in NEET MIND Premium.
Question 3 (AIPMT 2011, Q31)
Reproductive HealthZoologyMedium
The technique called gamete intrafallopian transfer (GIFT) is recommended for those females:
1. Option A: who cannot produce the ovum
2. Option B: who cannot retain the fetus inside uterus
3. Option C: whose cervical canal is too narrow to allow passage for the sperms
4. Option D: who cannot provide suitable environment for fertilisation
The answer and explanation for this question are in NEET MIND Premium.
Question 4 (AIPMT 2011, Q32)
Breathing and Exchange of GasesZoologyMedium
Which one of the following is a possibility for most of us in regard to breathing, by making a conscious effort?
1. Option A: One can breathe out air totally without oxygen.
2. Option B: One can breathe out air through eustachian tubes by closing both the nose and the mouth.
3. Option C: One can consciously breathe in and breathe out by moving the diaphragm alone, without moving the ribs at all.
4. Option D: The lungs can be made fully empty by forcefully breathing out all air from them.
The answer and explanation for this question are in NEET MIND Premium.
Question 5 (AIPMT 2011, Q33)
Microbes in Human WelfareBotanyMedium
Bacillus thuringiensis forms protein crystals which contain insecticidal protein.
1. Option A: Binds with epithelial cells of midgut of the insect pest ultimately killing it
2. Option B: is coded by several genes including the gene cry
3. Option C: is activated by acidic pH of the foregut of the insect pest
4. Option D: does not kill the carrier bacterium which is itself resistant to this toxin
The answer and explanation for this question are in NEET MIND Premium.
Question 6 (AIPMT 2011, Q34)
Sexual Reproduction in Flowering PlantsBotanyEasy
Which one of the following pairs is wrongly matched while the remaining three are correct?
1. Option A: Penicillium - Conidia
2. Option B: Water hyacinth - Runner
3. Option C: Bryophyllum - Leaf buds
4. Option D: Agave - Bulbils
The answer and explanation for this question are in NEET MIND Premium.
Question 7 (AIPMT 2011, Q35)
Morphology of Flowering PlantsBotanyMedium
Which one of the following diagrams represents the placentation in Dianthus?
1. Option A: Option (1)
2. Option B: Option (2)
3. Option C: Option (3)
4. Option D: Option (4)
The answer and explanation for this question are in NEET MIND Premium.
Question 8 (AIPMT 2011, Q36)
Animal KingdomZoologyMedium
Which one of the following statements is totally wrong about the occurrence of notochord, while the others are correct?
1. Option A: It is present only in larval tail in Ascidians
2. Option B: It is replaced by a vertebral column in adult frog
3. Option C: It is absent throughout life in humans from the very beginning
4. Option D: It is present throughout life in Amphioxus
Show answer & explanationHide answer & explanation
Correct answer: (C) It is absent throughout life in humans from the very beginning
Explanation
Humans possess a notochord during embryonic development which is later replaced by the vertebral column.
Question 9 (AIPMT 2011, Q37)
EcosystemBotanyEasy
Which one of the following animals may occupy more than one trophic level in the same ecosystem at the same time?
1. Option A: Sparrow
2. Option B: Lion
3. Option C: Goat
4. Option D: Frog
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Question 10 (AIPMT 2011, Q38)
EcosystemBotanyEasy
Both, hydrarch and xerarch successions lead to:
1. Option A: Medium water conditions
2. Option B: Xeric conditions
3. Option C: Highly dry conditions
4. Option D: Excessive wet conditions
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Question 11 (AIPMT 2011, Q39)
Human ReproductionZoologyMedium
What happens during fertilisation in humans after many sperms reach close to the ovum?
1. Option A: Secretions of acrosome help one sperm enter cytoplasm of ovum through zona pellucida
2. Option B: All sperms except the one nearest to the ovum lose their tails
3. Option C: Cells of corona radiata trap all the sperms except one
4. Option D: Only two sperms nearest the ovum penetrate zona pellucida
The answer and explanation for this question are in NEET MIND Premium.
Question 12 (AIPMT 2011, Q40)
Human ReproductionZoologyEasy
About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occur?
1. Option A: 14th day
2. Option B: 20th day
3. Option C: 5th day
4. Option D: 11th day
The answer and explanation for this question are in NEET MIND Premium.
Question 13 (AIPMT 2011, Q41)
Structural Organisation in AnimalsZoologyEasy
The cells lining the blood vessels belong to the category of:
1. Option A: Smooth muscle tissue
2. Option B: Squamous epithelium
3. Option C: Columnar epithelium
4. Option D: Connective tissue
The answer and explanation for this question are in NEET MIND Premium.
Question 14 (AIPMT 2011, Q42)
Biological ClassificationBotanyMedium
The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of:
1. Option A: Taenia, a tapeworm
2. Option B: Wuchereria, a filarial worm
3. Option C: Rhizopus, a mould
4. Option D: Ascaris, a roundworm
The answer and explanation for this question are in NEET MIND Premium.
Question 15 (AIPMT 2011, Q43)
Cell: The Unit of LifeBotanyMedium
The figure below shows the structure of a mitochondrion with its four parts labeled (A), (B), (C) and (D). Select the part correctly matched with its function.
1. Option A: Part (D): Outer membrane gives rise to inner membrane by splitting
2. Option B: Part (B): Inner membrane forms infoldings called cristae
3. Option C: Part (C): Cristae possess single circular DNA molecule and ribosomes
4. Option D: Part (A): Matrix is major site for respiratory chain enzymes
The answer and explanation for this question are in NEET MIND Premium.
Question 16 (AIPMT 2011, Q44)
Microbes in Human WelfareBotanyEasy
Read the following statement having two blanks (A and B): "A drug used for ______ (A) ______ patients is obtained from a species of the organism ______ (B) ______." The one correct option for the two blanks 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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Question 17 (AIPMT 2011, Q45)
Biotechnology and Its ApplicationsZoologyMedium
Silencing of mRNA has been used in producing transgenic plants resistant to:
1. Option A: Bollworms
2. Option B: Nematodes
3. Option C: White rusts
4. Option D: Bacterial blights
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Question 18 (AIPMT 2011, Q46)
Cell Cycle and Cell DivisionBotanyEasy
At metaphase, chromosomes are attached to the spindle fibres by their:
1. Option A: Satellites
2. Option B: Secondary constrictions
3. Option C: Kinetochores
4. Option D: Centromere
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Question 19 (AIPMT 2011, Q47)
Strategies For Enhancement In Food ProductionBotanyMedium
Consider the following statements (A-D) about organic farming: (A) Utilises genetically modified crops like Bt cotton (B) Uses only naturally produced inputs like compost (C) Does not use pesticides and urea (D) Produces vegetables rich in vitamins and minerals Which of the above statements are correct?
1. Option A: (B), (C) and (D)
2. Option B: (C) and (D) only
3. Option C: (B) and (C) only
4. Option D: (A) and (B) only
Show answer & explanationHide answer & explanation
Correct answer: (C) (B) and (C) only
Explanation
Organic farming uses natural inputs and avoids synthetic pesticides and fertilisers like urea. It does not utilise GM crops.
Question 20 (AIPMT 2011, Q48)
Body Fluids and CirculationZoologyEasy
One of the constituents of the pancreatic juice while poured into the duodenum in humans, is:
1. Option A: Trypsinogen
2. Option B: Chymotrypsin
3. Option C: Trypsin
4. Option D: Enterokinase
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Question 21 (AIPMT 2011, Q49)
Body Fluids and CirculationZoologyEasy
Frogs differ from humans in possessing:
1. Option A: paired cerebral hemispheres
2. Option B: hepatic portal system
3. Option C: nucleated red blood cells
4. Option D: thyroid as well as parathyroid
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Question 22 (AIPMT 2011, Q50)
Human Health and DiseaseZoologyMedium
Which one of the following options gives the correct matching of a disease with its causative organism and mode of infection?
1. Option A: 1
2. Option B: 2
3. Option C: 3
4. Option D: 4
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Question 23 (AIPMT 2011, Q51)
Anatomy of Flowering PlantsBotanyMedium
Function of companion cells is:
1. Option A: Providing energy to sieve elements for active transport
2. Option B: Providing water to phloem
3. Option C: Loading sucrose into sieve elements by passive transport
4. Option D: Loading of sucrose into sieve elements
The answer and explanation for this question are in NEET MIND Premium.
Question 24 (AIPMT 2011, Q52)
Principles of Inheritance and VariationBotanyEasy
Test cross in plants or in Drosophila involves crossing:
1. Option A: between two genotypes with recessive trait
2. Option B: between two F1 hybrids
3. Option C: the F1 hybrid with a double recessive genotype
4. Option D: between two genotypes with dominant trait
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Question 25 (AIPMT 2011, Q53)
Anatomy of Flowering PlantsBotanyMedium
Some vascular bundles are described as open because these:
1. Option A: are surrounded by pericycle but not endodermis
2. Option B: are capable of producing secondary xylem and phloem
3. Option C: possess conjunctive tissue between xylem and phloem
4. Option D: are not surrounded by pericycle
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Question 26 (AIPMT 2011, Q54)
Cell: The Unit of LifeBotanyEasy
In mitochondria, protons accumulate in the:
1. Option A: Outer membrane
2. Option B: Inner membrane
3. Option C: Intermembrane space
4. Option D: Matrix
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Question 27 (AIPMT 2011, Q55)
EcosystemBotanyEasy
The breakdown of detritus into smaller particles by earthworm is a process called:
1. Option A: Humification
2. Option B: Fragmentation
3. Option C: Mineralisation
4. Option D: Catabolism
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Question 28 (AIPMT 2011, Q56)
Morphology of Flowering PlantsBotanyEasy
Whorled, simple leaves with reticulate venation are present in:
1. Option A: Calotropis
2. Option B: Neem
3. Option C: China Rose
4. Option D: Alstonia
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Question 29 (AIPMT 2011, Q57)
Morphology of Flowering PlantsBotanyMedium
Sweet potato is homologous to:
1. Option A: Potato
2. Option B: Colocasia
3. Option C: Ginger
4. Option D: Turnip
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Question 30 (AIPMT 2011, Q58)
Molecular Basis of InheritanceBotanyMedium
The unequivocal proof of DNA as the genetic material came from the studies on a:
1. Option A: Bacterium
2. Option B: Fungus
3. Option C: Viroid
4. Option D: Bacterial virus
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Question 31 (AIPMT 2011, Q59)
Plant KingdomBotanyMedium
Consider the following four statements whether they are correct or wrong: (A) The sporophyte in liverworts is more elaborate than that in mosses (B) Salvinia is heterosporous (C) The life-cycle in all seed-bearing plants is diplontic (D) In Pinus male and female cones are borne on different trees Which of the following combinations is correct?
1. Option A: Statements (A) and (C)
2. Option B: Statements (A) and (D)
3. Option C: Statements (B) and (C)
4. Option D: Statements (A) and (B)
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Question 32 (AIPMT 2011, Q60)
Structural Organisation in AnimalsZoologyHard
Consider the following four statements (A-D) related to the common frog Rana tigrina, and select the correct option stating which ones are true (T) and which ones are false (F). (A) On dry land it would die due to lack of $O_2$ if its mouth is forcibly kept closed for a few days. (B) It has four-chambered heart. (C) On dry land it turns uricotelic from ureotelic. (D) Its life-history is carried out in pond water.
1. Option A: Option (1)
2. Option B: Option (2)
3. Option C: Option (3)
4. Option D: Option (4)
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Question 33 (AIPMT 2011, Q61)
Photosynthesis in Higher PlantsBotanyMedium
In Kranz anatomy, the bundle sheath cells have:
1. Option A: Thin walls, many intercellular spaces and no chloroplasts
2. Option B: Thick walls, no intercellular spaces and large number of chloroplasts
3. Option C: Thin walls, no intercellular spaces and several chloroplasts
4. Option D: Thick walls, many intercellular spaces and few chloroplasts
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Question 34 (AIPMT 2011, Q62)
Body Fluids and CirculationZoologyMedium
Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?
1. Option A: Complex QRS — one complete pulse
2. Option B: Peak T — initiation of total cardiac contraction
3. Option C: Peak P and Peak R together — systolic and diastolic blood pressures
4. Option D: Peak P — initiation of left atrial contraction only
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Question 35 (AIPMT 2011, Q63)
Structural Organisation in AnimalsZoologyMedium
Which one of the following structures in Pheretima is correctly matched with its function?
1. Option A: Clitellum — secretes cocoon
2. Option B: Gizzard — absorbs digested food
3. Option C: Setae — defence against predators
4. Option D: Typhlosole — storage of extra nutrients
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Question 36 (AIPMT 2011, Q64)
Plant KingdomBotanyHard
Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because:
1. Option A: Female gametophyte is free and gets dispersed like seeds
2. Option B: Female gametophyte lacks archegonia
3. Option C: Megaspores possess endosperm and embryo surrounded by seed coat
4. Option D: Embryo develops in female gametophyte which is retained on parent sporophyte
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Question 37 (AIPMT 2011, Q65)
Breathing and Exchange of GasesZoologyMedium
Bulk of carbon dioxide $CO_2$ released from body tissues into the blood is present as:
1. Option A: bicarbonate in blood plasma and RBCs
2. Option B: Free $CO_2$ in blood plasma
3. Option C: 70% carbamino-haemoglobin and 30% as bicarbonate
4. Option D: Carbamino-haemoglobin in RBCs
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Question 38 (AIPMT 2011, Q66)
Sexual Reproduction in Flowering PlantsBotanyEasy
In angiosperms, functional megaspore develops into:
1. Option A: Embryo sac
2. Option B: Ovule
3. Option C: Endosperm
4. Option D: Pollen sac
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Question 39 (AIPMT 2011, Q67)
Organisms and PopulationsBotanyHard
Consider the following statements (A)-(D) each with one or two blanks. (A) Bears go into __(1)__ during winter to __(2)__ cold weather. (B) A conical age pyramid with a broad base represents __(3)__ human population. (C) A wasp pollinating a fig flower is an example of __(4)__. (D) An area with high levels of species richness is known as __(5)__. Which one of the following options gives the correct fill ups for the respective blank numbers from (1) to (5) in the statements?
1. Option A: (1) (2) - stable (4) commensalism, (5) marsh
2. Option B: (2) (1) - aestivation, (5) - escape, (3) - stable, (4) - mutualism
3. Option C: (3) (3) - expanding, (4) - commensalism, (5) biodiversity park
4. Option D: (4) (1)- hibernation, (2) - escape, (3) - expanding, (5) hot spot
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Question 40 (AIPMT 2011, Q68)
Sexual Reproduction in Flowering PlantsBotanyEasy
What is common between vegetative reproduction and apomixis?
1. Option A: Both are applicable to only dicot plants
2. Option B: Both bypass the flowering phase
3. Option C: Both occur round the year
4. Option D: Both produce progeny identical to the parent
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Question 41 (AIPMT 2011, Q69)
Human Health and DiseaseZoologyEasy
Common cold is not cured by antibiotics because it is:
1. Option A: caused by a virus
2. Option B: caused by a Gram-positive bacterium
3. Option C: caused by a Gram-negative bacterium
4. Option D: not an infectious disease
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Question 42 (AIPMT 2011, Q70)
Photosynthesis in Higher PlantsBotanyEasy
Which one of the following is not an essential mineral element for plants while the remaining three are?
1. Option A: Iron
2. Option B: Manganese
3. Option C: Cadmium
4. Option D: Phosphorus
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Question 43 (AIPMT 2011, Q71)
Biodiversity and ConservationBotanyEasy
Biodiversity of a geographical region represents:
1. Option A: Endangered species found in the region
2. Option B: The diversity in the organisms living in the region
3. Option C: Genetic diversity present in the dominant species of the region
4. Option D: Species endemic to the region
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Question 44 (AIPMT 2011, Q72)
Cell: The Unit of LifeBotanyEasy
Which one of the following is not considered as a part of the endomembrane system?
1. Option A: Golgi complex
2. Option B: Peroxisome
3. Option C: Vacuole
4. Option D: Lysosome
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Question 45 (AIPMT 2011, Q73)
Structural Organisation in AnimalsZoologyMedium
Which one of the following correctly represents the normal adult human dental formula?
1. Option A: Option (1)
2. Option B: Option (2)
3. Option C: Option (3)
4. Option D: Option (4)
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Question 46 (AIPMT 2011, Q74)
Human Health and DiseaseZoologyMedium
Select the correct statement with respect to diseases and immunisation:
1. Option A: If due to some reason B and T lymphocytes are damaged, the body will not produce antibodies against a pathogen
2. Option B: Injection of dead or inactivated pathogens causes passive immunity
3. Option C: Certain protozoans have been used to mass produce hepatitis B vaccine
4. Option D: Injection of snake antivenom against snake bite is an example of active immunisation
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Question 47 (AIPMT 2011, Q75)
Animal KingdomZoologyHard
The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.
1. Option A: (a) and (d) respire mainly through body wall
2. Option B: (b) and (c) show radial symmetry
3. Option C: (a) and (b) have cnidoblasts for self-defence
4. Option D: (c) and (d) have a true coelom
Show answer & explanationHide answer & explanation
Correct answer: (D) (c) and (d) have a true coelom
Explanation
Animals (c) and (d) are true coelomates belonging to higher animal groups.
Question 48 (AIPMT 2011, Q76)
Molecular Basis of InheritanceBotanyEasy
In history of biology, human genome project led to the development of:
1. Option A: Biotechnology
2. Option B: Biomonitoring
3. Option C: Bioinformatics
4. Option D: Biosystematics
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Question 49 (AIPMT 2011, Q77)
Principles of Inheritance and VariationBotanyEasy
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child?
1. Option A: two X chromosomes
2. Option B: only one Y chromosome
3. Option C: only one X chromosome
4. Option D: one X and one Y chromosome
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Question 50 (AIPMT 2011, Q78)
Photosynthesis in Higher PlantsBotanyEasy
Which one of the following is essential for photolysis of water?
1. Option A: Manganese
2. Option B: Zinc
3. Option C: Copper
4. Option D: Boron
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Question 51 (AIPMT 2011, Q79)
Biotechnology: Principles and ProcessesZoologyEasy
Which one of the following techniques made it possible to genetically engineer living organisms?
1. Option A: Recombinant DNA techniques
2. Option B: X-ray diffraction
3. Option C: Heavier isotope labelling
4. Option D: Hybridization
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Question 52 (AIPMT 2011, Q80)
Structural Organisation in AnimalsZoologyMedium
Ureters act as urogenital ducts in:
1. Option A: human males
2. Option B: human females
3. Option C: frog's both males and females
4. Option D: frog's males
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Question 53 (AIPMT 2011, Q81)
Locomotion and MovementZoologyEasy
The type of muscles present in our:
1. Option A: heart are involuntary and unstriated smooth muscles
2. Option B: intestine are striated and involuntary
3. Option C: thigh are striated and voluntary
4. Option D: upper arm are smooth muscle fibres fusiform in shape
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Question 54 (AIPMT 2011, Q82)
Biotechnology: Principles and ProcessesZoologyHard
Read the following four statements (A-D) about certain mistakes in two of them: (A) The first transgenic buffalo, Rosie produced milk which was human alpha-lactalbumin enriched. (B) Restriction enzymes are used in isolation of DNA from other macro-molecules. (C) Downstream processing is one of the steps of R-DNA technology. (D) Disarmed pathogen vectors are also used in transfer of R-DNA into the host. Which are the two statements having mistakes?
1. Option A: Statement (B) and (C)
2. Option B: Statement (C) and (D)
3. Option C: Statement (A) and (C)
4. Option D: Statement (A) and (B)
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Question 55 (AIPMT 2011, Q83)
Chemical Coordination and IntegrationZoologyEasy
The 24 hour (diurnal) rhythm of our body such as the sleep-wake cycle is regulated by the hormone:
1. Option A: calcitonin
2. Option B: prolactin
3. Option C: adrenaline
4. Option D: melatonin
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Question 56 (AIPMT 2011, Q84)
Photosynthesis in Higher PlantsBotanyEasy
Guttation is the result of:
1. Option A: Diffusion
2. Option B: Transpiration
3. Option C: Osmosis
4. Option D: Root pressure
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Question 57 (AIPMT 2011, Q85)
Plant KingdomBotanyHard
Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.
1. Option A: Option (1)
2. Option B: Option (2)
3. Option C: Option (3)
4. Option D: Option (4)
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Question 58 (AIPMT 2011, Q86)
Locomotion and MovementZoologyMedium
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.
1. Option A: Pair (1)
2. Option B: Pair (2)
3. Option C: Pair (3)
4. Option D: Pair (4)
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Question 59 (AIPMT 2011, Q87)
The Living WorldBotanyMedium
Which one of the following aspects is an exclusive characteristic of living things?
1. Option A: Isolated metabolic reactions occur in vitro
2. Option B: Increase in mass from inside only
3. Option C: Perception of events happening in the environment and their memory
4. Option D: Increase in mass by accumulation of material both on surface as well as internally
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Question 60 (AIPMT 2011, Q89)
Microbes in Human WelfareBotanyMedium
Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining are correct?
1. Option A: Yeast – statins
2. Option B: Acetobacter aceti – acetic acid
3. Option C: Clostridium butylicum – lactic acid
4. Option D: Aspergillus niger – citric acid
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Question 61 (AIPMT 2011, Q90)
Organisms and PopulationsBotanyMedium
The logistic population growth is expressed by the equation:
1. Option A: Option (1)
2. Option B: Option (2)
3. Option C: Option (3)
4. Option D: Option (4)
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