Previous Year Question Paper Of AIIMS MBBS Entrance Exam

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AIIMS MBBS Entrance Exam question paper

Biology

1. Speciation of sympatric Species is due to

(a) geographic isolation
(b) reproductive isolation
(c) isolation/separation
(d) migration

2. The application of synthetic plant hormone like IAA, IBA and NAA are best described as

(a) prevent early fruit fall before harvesting and ts used to produce parthenocarpic fruit
(b) prevent early fruit tall only
(c) to produce both seed less fruits and fruits with seeds
(d) to produce larger fruit

3. Flame cells and Malpighian tubules are the analogous organ in

(a) insects and arthropods respectively
(b) arthropods and echinodermates respectively
(c) helminths and arthropods with other insect respectively
(d) arthropods and other insect with helminths respectively

4. Trochlear, trigeminal and glosspharyngeal nerve are respectively

(a) IX, V and IV
(b) IV, V and IX
(c) V, IV and IX
(d) IV, V and IX

5. Who had proposed theory of cohesion and adhesion forces?
(a) Dixon and Jolly (1894)
(b) Dixon and Benson (1885)
(c) Dixon and Jolly (1950)
(d) Sir Jagdish Chandra Bose (1850)

6. Which one of the following useful organisms is not a part in production of curd/yoghurt?

(a) S. thermophiluS
(b) Lactobacillus bulgaricus
(C) Acetobactor aceti
(d) Streptococcus lactis

7. The drugs, which do not develop physiological dependence is
(a) sedative and tranqualisers
(b) stimulational cocaine
(c) opiates
(d) hallucinogens

8. Organogenesis or morphogenesis in tissue culture is controlled/regulated by phytohormones the credit of this important discovery goes to

(a) Skoog and Miller (1957)
(b) Guha and Maheswan (1964)
(c) Calvin and Benson (1894)
(d) Halperin and Wetherell (1964)

9. A man whose father is a colourblind, marry a woman, who is a daughter of colourblind mother. The offspring of this couple will be

(a) all daughter and sons are colourblind
(b) 50% colourblind and 50% normal son
(c) carrier normal daughter and colourblind sons
(d) colourblind sons and normal daughter

10. In a child of 15 years age, plasma calcium level is diagnosed below optimum level. Which organ is malfunctioning?

(a) Thyroid gland
(b) Liver
(c) Parathyroid
(d) Posterior lobe of pituitary

11. Which one of the following best describe polygenic inheritance?

(a) ABO blood group in human and flower colour of Mtrabilis Jalapa
(b) Hair pigment of mouse and tongue roliing humans
(f) Human eye colour and sickle-cell anaemia
(g) Human height and colour of skin and eyes

12. Go through the following table comparing the effect of sympathetic and parasympathetic nervous system. Which one is matched correctly?



Complete Paper

13. Which one of the following set meaning isnot different?

(a) Cistron —-Triplet
(0) DNA profile —-DNA type
(c) Gene pool —-Genome
(d) Gene —-Codon

14. How macula lutea and corpus luteum are related?

(a) Contribute in maintain pregnancy
(b) Both are a source of hormones
(c) Both are charaterised by their yellow colour
(d) Both are found in human ovaries

15. Which one as used/regarded as biofertiliser ?

(a) A association between pteridophytes and cyanobacteria Anabaena
(b) A association between gymnosperms and Nostoc
(c) A association between legume and Rnizobium
(d) All of the above

16. The common characteristic showing by mushroom smut and rust
(a) is characterised by presence of basidiocarps
(b) is characterised by presence of ascocarps
(c) all are pathogen
(d) all are saprophytic in nature

17. A reptilian looks like house lizard is sitting on plant with its tail coiled around twig in your garden. Can you identify the animal?
(a) Garden lizard (Calotes) showing camouflage
(b) Chamaeleon showing protective colouration
(c) Varanus showing mimicry
(d) Hemidactylus showing sexual dimorphism

18. Different varieties of Indian mangoes are most popular in Western and some other European countries. The varieties with different flavour, colour, sugar and fleshy content is due to

(a) genetic diversity
(b) species diversity
(c) induced mutation
(d) hybridisation

19. hn RNA undergoes two additional process. Out of them in one process an unusual nucleotide (methyl GPT) is added to the 5’end of molecule. What would you called this?

(a) Tailing
(b) Splicing
(c) Termination
(d) Capping

20. Which one exhibits the character of a protozoan during one phase of its life cycle and character of fungi in another phase of its life cycle?

(a) Water moulds
(b) Psilophytes
(c) Slime moulds
(d) Diatoms

21. Wernickes syndrome is generally common in alcoholic person; which is characterised by less mental activity and dual vision. It is caused by the deficiency of

(a) riboflavin
(b) thiamine
(c) pyridoxine
(d) retinol

22. Which one of the most common embryo sac in flowering plant?

(a) Monosporic, 8 nucleated and 7 celled
(b) Monosporic, 7 celled and 7 nucleated
(c) Bisporic, 8 nucleated and 7 celled
(d) Bisporic. 8 nucleated and 7 celled

23. Which type of immunoglobulin is/areabundantly found in foetus?

(a) IgE
(b) IgG
(c) IgM
(d) IgD

24. The mandatory combination responsible for assembly of microtubules are

(a) Na+ and Ca2+
(b) Mg2+ and Ca2+
(c) Cl– and Ca2-
(d) Na+ and K–

25. Which one plant movement is unidirectional?

(a) Phototaxis
(b) Chemotaxis
(c) Both (a) and (b)
(d) Thigmotrophism

26. The exchange of segments of two non-homologous pair of chromosomes is termed as

(a) crossing over
(b) linkage
(c) transformation
(d) transiocation

27. Spirochaetes is/are

(a) a class of viruses
(b) myxobacterie
(c) spiral-shaped bacteria
(d) ricrhittsias

28. SER and RER can be distinguished with its presence in

(a) protein synthesising cells
(b) protein and lipid synthesising cells
(C) carbohydrates and fat synthesising cells
(d) tat and protein synthesising cells

29. Human Immuno Virus (HIV) contain a protein coat and genetic material and is horse chestnut shaped

(a) double-stranded DNA
(b) single-stranded DNA
(c) single-stranded RNA
(d) double-stranded RNA

30. Root cambium is derived from

(a) primary meristem
(b) secondary meristem
(c) intercalary meristem
(d) apical maristem

31. Which one contain most reduced form of stem?

(a) Bulb
(b) Rhizome
(c) Tuber
(d) Twinner

32. Which enzyme complex is responsible for the reduction of molecular nitrogen to the level of NH3 in root module of legume?
(a) Aminase
(b) Nitrogenase
(c) Nitrate reductase
(d) Nitrite reductase

33. The plants which can withstand with narrow and broad range of temperature tolerance respectively are
(a) munotherrnai and stencthermal
(b) stenuthermal and monothermal
(c) stenothermal and eurythermal
(d) stenothermal and mesothermal

34. Desert can be converted into a lush green land by planting

(a) terestrial plant
(b) xerophytic plant
(c) halophytes
(d) psammophytes

35. Which one is a source of commercially important product Syzygium aromaticum?

(a) Flower bud
(b) Axillany bud
(C) Thalamus
(d) Peduncle

36. When a fern plant is developed from its prothallus without fertilisation? This phenomenon is an example of

(a) parthenocarpy
(b) apospory
(c) apospory
(d) organogenesis

37. Bruners gland are characteristic feature of
(a) jejunum of small intestine
(b) ileum
(c) duodenum
(d) fundic region of stomach

38. Which one dental formula represent a heterodont placental draught and tough animal?


39. Pollorum disease in fowls is caused by
(a) Salmonella
(b) clostridium
(c) Hemophilus
(d) Mycobacterum

40. Green muffler play a Important role against

(a) noise pollution
(b) radioactive pollution
(c) soil pollution
(d) air pollution

Directions (Q.Nos. 41-60) These questions consist two statement each printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four options.
(a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
(b) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
(c) Assertion is true but Reason is false.
(d) Both Assertion and Reason are false

41.Assertion Plasmids are single stranded extrachromosomal DNA.
Reason Plasmid are usually present in eukaryotic cells.

42. Assertion The megaspore mother cell divide by meiotic division to produce four spore.
Reason Megaspore Mother Cell (MMC) are diploid and megaspore are haploid.

43. Assertion Living organisms are considered as a close system.
Reason Energy of living organism can not be lost or gained from external environment.

44. Assertion Medulla is considered as a respiratory centre in animals.
Reason Rate of breathing is regulated by medulla because of the changes in O2 content of blood.

45. Assertion Tropical rain forest are nth in flora and fauna along with microbes on this biosphere.
Reason The low latitude humid tropics harbour the rainforest ecosystem.

46. Assertion Erythroblastosis foetalis is disease related with Rh factor and may cause death of developing foetus inside womb.
Reason It cause massive destruction of erythrocytes in foetus that leads to anaemia and tissue damage of foetus.

47.Assertion Radial vascular bundle is the characteristic of majority of the roots including dicots and monocots.
Reason Monocot stein is characterised by colletral open vascular bundle.

48. Assertion Due to excessive use of fertiliser and pesticides the available capillary water turns to hypotonic is relation to cell sap.
Reason The water molecule as a result diffuse out of the cells due to endosmosis.

49. Assertion Amphibian heart consist of two auricle and one ventricle.
Reason The deoxygenated blood is returned to heart through sinus venosus.

50. Assertion Humans are considered advanced from all its primates relatives because of the larger cranial capacity and high intelligence.
Reason A lumber curve is present in man which is also present in apes.

51.Assertion Chromosomes are divided into heterochromatin and euchromatin
part.
Reason Heterochromatin are those regions of chromosome that remain condensed during interphase and rest of the non-condensed chromosome are called euchromatin.

52. Assertion Tongue is a gustatoreceptor.
Reason Receptors for gustatosensation are located in taste bud.

53. Assertion Aflatoxin are commercially produced by a species of aspergilli.
Reason These toxin are useful to mankind.

54. Assertion Mosses are might have originated from algae.
Reason Protonema of bryophytes Is similar to some green algae.

55. Assertion Cartilage and bone are flexible and rigid connective tissue.
Reason Blood is a connective tissue.

56. Assertion Cell wall is generally absent in animal cell.
Reason Animal cells are covered by a cell membrane.

57. Assertion Holoblastic cleavage with almost equal sized blastomeres is a characteristics feature of placental mammals.
Reason Egg of most mammal including human are of centrolecithal type.

58. Assertion Most cells in human body release excessive amount of inflammatory chemicals which cause allergic reactions.
Reason Allergen present in environment on reaching human body stimulate mast cells in certain individuals.

59. Assertion In angiosperm, the conduction of water is more efficient because xylem contain vessels.
Reason Conduction of water by xylem vessels elements is an active process with energy supplied by xylem parenchyma rich in mitochondria.

60. Assertion Gram negative bacteria do not retain the stain when washed with alcohol.
Reason The outer membrane of Gram negative (-ve) bacteria contain lipopolysaccharides, a part of which is integrated into membrane lipid.