AIPMT 2014 Biology Solved Paper

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Q1. Viruses have :
Correct Answer: (a)
Viruses consist of genetic material (DNA or RNA, never both) inside a protein coat (capsid).
Q2. Injury localized to the hypothalamus would most likely disrupt :
Correct Answer: (d)
Hypothalamus contains centers for thermoregulation, hunger, and thirst.
Q3. Deficiency symotoms of nitrogen and potassium are visible first in :
Correct Answer: (a)
N and K are mobile elements; they move from old (senescent) leaves to young leaves, so old leaves show deficiency first.
Q4. Fight – or – flight reactions cause activation of :
Correct Answer: (c)
Catecholamines from the adrenal medulla trigger the 'fight or flight' response.
Q5. A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become while – coloured like alinos. Which of the following terms will you use to describe them?
Correct Answer: (c)
Growth in the absence of light resulting in pale color and long weak stems is etiolation.
Q6. Which one of the following statement is correct ?
Correct Answer: (c)
Maize (a monocot) has a specialized protein layer called the aleurone layer surrounding the endosperm.
Q7. An analysis of chromosomal DNA using the southern hybridization technique does not use:
Correct Answer: (d)
Southern Blotting uses electrophoresis, transfer (blotting), and probe hybridization with autoradiography. It does not inherently require PCR.
Q8. Select the option which is not correct with respect to enzyme action :
Correct Answer: (b)
Competitive inhibition (malonate/succinate) can be reversed by increasing substrate concentration.
Q9. Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below?
Correct Answer: (a)
The image is of Datura, which is a hallucinogen.
Q10. Select the correct option describing gonadotropin activity in a normal pregnant female :
Correct Answer: (c)
hCG maintains the corpus luteum, ensuring continued estrogen and progesterone production.
Q11. Match the following and select the correct answer :
(a) Centriole(i) Infoldings in mitochondria
(b) Chlorophyll(ii) Thaylakoids
(c) Cristae(iii) Nucleic acids
(d) Ribozymes(iv) basal body cilia or flagella
Correct Answer: (a)
Centriole forms basal bodies; Chlorophyll is in thylakoids; Cristae are mitochondrial infoldings; Ribozymes are catalytic nucleic acids.
Q12. Tubectomy is a method of sterilization in which :
Correct Answer: (a)
Tubectomy involves cutting/tying the fallopian tubes.
Q13. An alga which can be employed as food for human being is :
Correct Answer: (b)
Chlorella and Spirulina are single-cell proteins used as food supplements.
Q14. The solid linear cyroskeltal elements having a diameter of 6 nm and made up of a single type of monomer are known as :
Correct Answer: (b)
Microfilaments (Actin filaments) have a diameter of approx 6-7 nm.
Q15. Select the correct matching of the type of the joint with the example in human skeletal system :
Type of jointExample
(1) Carilaginous jointBetween frontal and paraiental
(2) Pivot jointBetween third and fourth cervical vertebrae
(3) Hinge jointBetween humerus and pectoral girdle
(4) Gliding jointBetween carpals
Correct Answer: (d)
Gliding joints are between carpals. Pivot is between Atlas/Axis; Hinge is at knee/elbow.
Q16. Male gametophyte with least number of cells is present in:
Correct Answer: (c)
Angiosperms (Lilium) have the most highly reduced male gametophyte (3 cells).
Q17. Select the Taxon mentioned that represents both marine and fresh water species :
Correct Answer: (d)
Cnidaria includes Hydra (freshwater) and Jellyfish (marine). Others are exclusively marine.
Q18. Choose the correctly matched pair :
Correct Answer: (c)
PCT and DCT are lined by simple cuboidal epithelium.
Q19. Fruit colour in squash is an example of :
Correct Answer: (b)
The 12:3:1 ratio in squash color is a classic case of dominant epistasis.
Q20. Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions (A-D) represent respectively?

ABCD
(1)InsectsCrustaceansOther animal groupsMolluscs
(2)CrustaceansInsectsMolluscsOther animal groups
(3)MolluscsOther animal groupsCrustaceansInsects
(4)InsectsMolluscsCrustaceanusOther animal groups
Correct Answer: (d)
In invertebrates: A-Insects (majority), B-Molluscs, C-Crustaceans, D-Other animal groups.
Q21. A human female with Turner’s syndrome :
Correct Answer: (a)
Turner's syndrome is monosomy (45, XO).
Q22. In ‘s’ phase of the cell cycle
Correct Answer: (a)
DNA replication occurs in S-phase, doubling the DNA content per cell.
Q23. A species facing exrtremely high risk of extinction in the immediate fucture is called:
Correct Answer: (c)
IUCN defines Critically Endangered as the highest risk level before extinction.
Q24. Which one of the following is wrong about chara?
Correct Answer: (c)
In Chara, the oogonium (nucule) is located above the antheridium (globule). Statement 3 is the inverse and therefore wrong.
Q25. Which one of the following growth regulators is known as ‘ stress hormone’?
Correct Answer: (a)
ABA is called the stress hormone as it induces stomatal closure during water stress.
Q26. The first human hormone produced by recombinant DNA technology is :
Correct Answer: (a)
Humulin (Insulin) was the first recombinant product.
Q27. Assisted reproductive technology, IVF involves transfer of :
Correct Answer: (b)
ZIFT (Zygote Intra Fallopian Transfer) involves zygote or early embryo (up to 8 blastomeres) transfer into fallopian tube.
Q28. If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
Plant → mice → snake → peacock
Correct Answer: (a)
Using Lindeman's 10% rule: Plant(20J) -> Mouse(2J) -> Snake(0.2J) -> Peacock(0.02J).
Q29. Person with blood group AB is considered as universal recipient because he has :
Correct Answer: (a)
AB group lacks anti-A and anti-B antibodies in plasma.
Q30. Just as a person moving from Delhi to shimla to escape the heat for the duration of hot summer, thousands of migratory birds from siberia and other extremely cold northern regions move to :
Correct Answer: (d)
Keolado National Park (Bharatpur) hosts migratory birds from Siberia.
Q31. Choose the correctly matched pair :
Correct Answer: (c)
Areolar and Adipose are types of Loose Connective Tissue.
Q32. Which of the following is responsible for peat formation ?
Correct Answer: (d)
Sphagnum (Peat Moss) accumulates and forms peat over long periods.
Q33. The zone of atmosphere in which the ozone layer is present is called :
Correct Answer: (c)
The 'Good Ozone' is located in the Stratosphere.
Q34. Transoformation was discovered by :
Correct Answer: (c)
Frederick Griffith discovered transformation using Streptococcus pneumoniae.
Q35. The osmotic expansion of a cell kept in water is chiefly regulated by:
Correct Answer: (b)
Vacuoles contain cell sap and maintain turgor pressure via osmosis.
Q36. Which of the following is a hormone releasing intra Uterine Device (IUD)
Correct Answer: (b)
LNG-20 (levonorgestrel) is a hormone-releasing IUD.
Q37. To obtain virus – free healthy plants from a diseased one by tissue culture techinique, which part/parts of the diseased plant will be taken?
Correct Answer: (c)
The apical and axillary meristems are generally virus-free due to rapid cell division.
Q38. A marine cartilaginous fish that can produce electric current is :
Correct Answer: (b)
Torpedo (Electric Ray) has electric organs derived from muscles.
Q39. Which of the following shows coiled RNA strand and capsomers ?
Correct Answer: (b)
TMV consists of a single-stranded RNA coiled inside a capsid made of capsomers.
Q40. Five kingdom system of classification suggested by R.H. Whittaker is not based on :
Correct Answer: (a)
Whittaker's classification was based on cell structure complexity, body organization, mode of nutrition, life style, and phylogenetic relationships. The specific 'presence/absence of a nucleus' was the basis for the earlier 2-kingdom systems or 4-kingdom systems distinguishing prokaryotes/eukaryotes, but not the primary driver of the 5th kingdom's separation.
Q41. Which structure perform the function of mitochondria in bacteria?
Correct Answer: (d)
Mesosomes are infoldings of the plasma membrane in bacteria that contain respiratory enzymes.
Q42. Which one of the following shows isogamy with non – flagellated gamets ?
Correct Answer: (d)
Spirogyra produces non-motile (non-flagellated) gametes that are similar in size (isogamy).
Q43. An example of edible underground stem is :
Correct Answer: (d)
Potato is a modified underground stem (tuber). Carrot and Sweet potato are modified roots.
Q44. At which stage of HIV infection does one usually show symtoms of AIDS ?
Correct Answer: (c)
AIDS symptoms appear when the CD4+ T-cell count drops significantly.
Q45. Dr. F. Went noted that if coleptile were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut-coleptile stumps. Of what significance is this experiment ?
Correct Answer: (b)
The Avena curvature test (Went's experiment) allows bioassay to quantify auxin concentration.
Q46. Match the following and select the correct option :
(a) Earthworm(i) Pioneer species
(b) Succession(ii) Detritivore
(c) Ecosystem service(iii) Natality
(d) Population growth(iv) Pollination
Correct Answer: (d)
Earthworm (Detritivore), Succession (Pioneer), Ecosystem service (Pollination), Pop growth (Natality).
Q47. You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?
Correct Answer: (c)
Roots have exarch protoxylem, while stems have endarch protoxylem.
Q48. Non – albuminous seed is produced in :
Correct Answer: (d)
Pea is a dicot with non-albuminous (non-endospermic) seeds.
Q49. A man whose father was colur blind marries a woman who had a colour bline mother and normal father. What percentage of male children of this couple will be colour blind ?
Correct Answer: (c)
Woman is a carrier (XCX). Man is normal (XY). Offspring males: 50% chance of inheriting XC (colorblind).
Q50. Commonly used vectors for human genome sequencing are :
Correct Answer: (b)
Bacterial Artificial Chromosomes and Yeast Artificial Chromosomes handle large human DNA inserts.
Q51. A scrubber in the exhaust of a chemical industrial plant removes:
Correct Answer: (a)
Scrubbers remove gases like SO2 by passing exhaust through a spray of water or lime.
Q52. Fructose is abosorbed bed into the blood through mucosa cells of intenstine by the process called :
Correct Answer: (b)
Fructose absorption occurs via facilitated diffusion using carrier proteins.
Q53. Which one of the following are analogues structures ?
Correct Answer: (a)
Pigeon wings (feathers) and Bat wings (skin) have different anatomy but same function (flight).
Q54. In which one of the following processes CO2 is not released ?
Correct Answer: (d)
Lactic acid fermentation converts pyruvate to lactate without releasing CO2.
Q55. When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as :
Correct Answer: (b)
Imbricate aestivation is when margins overlap but not in a regular clockwise or anti-clockwise pattern.
Q56. A location with luxuriant growth of lichens on the trees indicates that the
Correct Answer: (d)
Lichens are bioindicators; they are extremely sensitive to SO2 and do not grow in polluted areas.
Q57. Function of filiform apparatus is to
Correct Answer: (d)
The filiform apparatus in the synergids guides the pollen tube into the embryo sac.
Q58. Tracherids differ from other tracheray elements in :
Correct Answer: (b)
Tracheids are imperforate (lacking open ends/perforation plates), unlike vessel members.
Q59. Which of the following causes an increase in sodium reasorption in te distal convoluted tubule ?
Correct Answer: (a)
Aldosterone stimulates Na+ reabsorption in the DCT and collecting duct.
Q60. The intial step in the digestion of milk in human is carried out by ?
Correct Answer: (c)
Rennin curdles milk in infants to facilitate protein digestion.
Q61. Which one of the following is a non – reducing carbohydrate?
Correct Answer: (b)
Sucrose has its reducing groups (glucose C1 and fructose C2) involved in glycosidic linkage.
Q62. Stimulation of a muscle fiber by a motor neuron occurs at :
Correct Answer: (a)
Signals are transmitted across the Neuromuscular Junction (NMJ).
Q63. Placenta and pericarp are both edible portions in:
Correct Answer: (c)
In tomato, the entire fruit wall (pericarp) and the placentae are consumed.
Q64. Identify the hormone with its correct matching of source and function :
Correct Answer: (b)
Melatonin from the pineal gland controls the circadian rhythm.
Q65. During which phase (s) of cell cycle, amound of DNA in a cell remains at 4C level if the intial amount is denoted as 2C?
Correct Answer: (d)
After S-phase (replication), DNA is 4C. It remains 4C throughout G2 and Metaphase of Mitosis.
Q66. In vitro propagation in plants is characterized by :
Correct Answer: (a)
Micropropagation/In vitro propagation often uses molecular markers like RAPD (via PCR) to check genetic fidelity.
Q67. Geitonogamy involves
Correct Answer: (a)
Geitonogamy is the transfer of pollen to the stigma of another flower on the same plant.
Q68. Which vector can clone only small fragment of DNA ?
Correct Answer: (c)
Plasmids usually hold fragments up to 10kb; BAC and YAC hold hundreds of kb.
Q69. Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D) identify the blanks.

ABCD
(1)Rock mineralsDetritusLitter FallProducers
(2)Litter fallProducersRock MineralsDetritus
(3)DetritusRock mineralsProducerLitter fall
(4)ProducersLitter fallRock MineralsDetritus
Correct Answer: (c)
Based on the phosphorus cycle diagram: A-Detritus, B-Rock minerals, C-Producer, D-Litter fall.
Q70. An example of ex situ conservation is :
Correct Answer: (b)
Seed banks preserve germplasm outside natural habitats (Ex-situ).
Q71. Archaebacteria differ from eubacteria in :
Correct Answer: (a)
Archaebacteria have branched chain lipids in their cell membranes, which allows them to survive in extreme environments.
Q72. In a population of 1000 individuals 360 belong to genotype AA, 480 to Aa the and the remaining 160 to aa. Based on this date, the frequency of allele a in the population is :
Correct Answer: (a)
Frequency of 'a' = (160 * 2 + 480) / 2000 = 800/2000 = 0.4.
Q73. Which one of the following is wrongely matched
Correct Answer: (a)
Transcription is specifically the synthesis of RNA (usually mRNA) from DNA; tRNA is also transcribed, but the primary mismatch is the broad generalization compared to translation.
Q74. The enzyme recombines is required at which stage of meiosis :
Correct Answer: (a)
Crossing over (recombination) occurs in Pachytene.
Q75. Approximately seventy percent of carbon – dioxide absorbed by the blood will be transported to the lungs :
Correct Answer: (a)
70% of CO2 is carried as Bicarbonate ions (HCO3-).
Q76. Pollen tablets are available in tha market for:
Correct Answer: (c)
Pollen is rich in nutrients and used as a food supplement in some regions.
Q77. Select the correct option :
Direction of RNA SynthesisDirection of reading of the template DNA strand
(1)5’ – 3’3’ – 5’
(2)3’ – 5’5’ – 3’
(3)5’ – 3’5’ – 3’
(4)3’ – 5’3’ – 5’
Correct Answer: (a)
RNA is synthesized 5' to 3'; the DNA template is read 3' to 5'.
Q78. An aggregate fruit is one which develops from:
Correct Answer: (b)
Aggregate fruits (e.g., raspberry) develop from multiple free ovaries (apocarpous) of a single flower.
Q79. Which one of the following fungi contains hallucinogens ?
Correct Answer: (b)
Amanita muscaria contains muscimol and ibotenic acid, which have hallucinogenic properties.
Q80. Planaria posses high capacity of :
Correct Answer: (b)
Planaria can regenerate a whole individual from a small piece.
Q81. Anoxygric photosynthesis Is characterstics of :
Correct Answer: (a)
Rhodospirillum (purple non-sulfur bacteria) performs anoxygenic photosynthesis.
Q82. The main function of mammalian corpus luteum is to produce :
Correct Answer: (b)
Corpus luteum primarily secretes progesterone to maintain pregnancy.
Q83. Which one of the following living organisms completely lacks of cells wall ?
Correct Answer: (b)
Gorgonia is an animal (Cnidaria), and animal cells lack cell walls.
Q84. Which one of the following statements is not correct ?
Correct Answer: (c)
Retinal is an aldehyde of Vitamin A, not Vitamin C.
Q85. How do parasympathetic neural signals affect the working of the heart ?
Correct Answer: (a)
Vagus nerve (parasympathetic) releases ACh to slow down heart activity.
Q86. The shared terminal duct of the productive and urinary syste In the human ale is :
Correct Answer: (a)
In males, the urethra carries both urine and semen.
Q87. The motile bacteria are able to move by :
Correct Answer: (b)
Bacterial flagella provide motility.
Q88. What gases are produced in anaerobic sludge digesters ?
Correct Answer: (b)
Microbes in sludge digesters produce Methane, CO2, and H2S.
Q89. Forelimbs of cat, lizard used in walking forelimbs of whale used n swimming and forelimbs of bats used in flying are an example of :
Correct Answer: (c)
They have same anatomical origin but different functions.
Q90. The organization which publishes the Red list of species is :
Correct Answer: (b)
International Union for Conservation of Nature (IUCN) publishes the Red Data Book.

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