2023 2024 Student Forum > Management Forum > Entrance Exams

 
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10th December 2015, 09:27 AM
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Join Date: Apr 2013
Re: AIIMS Entrance Exam Previous Year Papers

Ok, as you want the previous year papers of AIIMS MBBS entrance exam so here I am providing you.

AIIMS MBBS entrance exam question paper

Biology


1. Energy flow in an ecosystem is
(a) unidirectional
(b) bidirectional
(c) multi-directional
(d) All of these

2. Who proposed a five-kingdom classification and named kingdoms as Monera, Prorista. Fungi, Plantae and Animalia?
(a) Herbert Copeland
(b) RH Whittaker
(c) Car! Woese
(d) Carolus Linnaeus

3. Which of the following organisms completely lack cell wall, they are the smallest living cells known and can survive without oxygen?
(a) Mycoplasma
(b) Euglenoids
(c) Slime moulds
(d) All of these

4. What is the correct order of the stages of cellular respiration?
(a) Krebs’ cycle electron- transport- chain rilycolysis
(b) Election transport chain – Krebs’ cycle – glycolysis
(c) Glycolysis – Krebs’ cycle – electron transport chain
(d) Glycolysis – electron transport chain – Krebs’ cycle

5. A mixture containing DNA fragments, a, b, c and d, with molecular weights of a b c. a > b and d > c, was subjected to agarose gel electrophoresis. The positions of these fragments from cathode to anode sides of the gel would be
(a) b, a, c, d
(b) a, b, c, d
(c) c, b, a, d
(d) b, a. d, c

6. Which of the following DNA sequences qualifies to he designated as a palindrome?
(a) 5′- GACCAG – 3′ in one strand
(b) 3′- GACCAG – 5′ in one strand
(c) 5′- GACGAG – 3’3′- CIGGIC – 5′
(d) 5′- AGCGCT’- 3’3′- TCGCGA – 5′

7. IUCN stands for
(a) Indian Union for Conservation of Nature
(b) International Union for Conservation of Nuture
(c) Indian Union for Chemical Nomenclature
(d) International Union for Conservation of Nutrients

8. Tendrils in plants are an example of
(a) convergent evolution
(b) radiation
(c) divergent evolution
(d) co-evolution

9. Haemoglobin is
(a) an oxygen carrier in human blood
(b) a protein used as food supplement
(c) an oxygen scavenger in root nodules
(d) a plant protein with high lysine content

10. Stomatal opening is affected by
(a) nitrogen concentration, carbon dioxide concentration and light
(b) carbon dioxide concentration, temperature and light
(c) nitrogen concentration, light and temperature
(d) carbon dioxide concentration, nitrogen concentration and temperature

11. Taxonomic hierarchy refers to
(a) step-wise arrangement of all categories for classification of plants and animals
(b) a group of senior taxonomists, who decide the nomenclature of plants and animals
(c) a list of botanists or zoologists, who have worked on taxonomy of a species or group
(d) classification of a species based on fossil record

12. Which of the following induces parturition?
(a) Vasopressin
(b) Oxytocin
(c) GH
(d) TSH

13. Excess carbohydrates and proteins are stored in the body as
(a) amino acids
(b) fats
(c) starch
(d) monosaccharides

14. Both sickle cell anaemia and Huntington’s chorea are
(a) bacteria-related diseases
(b) congenital disorders
(c) pollutant-induced disorders
(d) virus-related diseases

15. Which one of the following pairs in not correctly matched?
(a) Vitamin-B12 — Pernicious anaemia
(b) Vitamin-B6 — Loss of appetite
(c) Vitamin-B1 — Beri-beri
(d) Vitamin-B2 — Pellagra

16. The exchange of segments of non-sister chromatids between chromosomes of a homologous pair termed as
(a) transformation
(b) translocation
(c) crossing over
(d) chromosomal aberration

17. Okazaki is known for his contribution to the understanding of
(a) transcription
(b) translation
(c) DNA replication
(d) mutation

18. The beginning of understanding genetic transformation in bacteria was made by
(a) Frederick Griffith
(b) Hershey and Chase
(c) Watson and Crick
(d) TH Morgan

19. The source of taq polymerase used in PCR is a
(a) thermophilic fungus
(b) mesophilic fungus
(c) thermophilc bacterium
(d) halophilic bacterium

20. A pea plant parent having violet-coloured flowers with unknown genotype was crossed with a plant having white-coloured flowers. In the progeny, 5O% of the flowers were violet and 50% were white. The genotypic constitution of the parent having violet-coloured flowers was
(a) homozygous
(b) merozygous
(c) heterozygous
(d) hemizygous

21. If the total amount of adenine and thyrnine in a double-stranded DNA is 45%, the amount of guznine in this DNA will be
(a) 22.5%
(b) 27 5%
(c) 45%
(d) 55%

22. Typhoid fever is caused by a species of
(a) Streptococcus
(b) Staphylococcus
(C) Salmonella
(d) Mycobacterium

23. HIV is a member of a group of viruses called
(a) bacteriophages
(b) geminiviruses
(c) lysogenic viruses
(d) retroviruses

24. The number of linkage group(s) present in Escherichia Coli is
(a) one
(b) two
(c) four
(d) seven

25. Natural cytokinins are sythesized in tissue that are
(a) senescent
(b) dividing rapidly
(c) storing food material
(d) differennating

26. Resemblance of one organism to another for protection and hiding is
(a) mimicry
(b) predation
(c) adaptation
(d) camouflage

27. Spirochaetes is are
(a) a class or insects
(b) a class of viruses
(c) bacteria
(d) fungi

28. The metachromatic granules are
(al present in plants cell at metaphase stage
(b) inclusion bodies in bacteria
(c) produced in insects during metamorphosis
(d) chromatophores in animals skin

29. Clamp connection is found In
(a) Basidiomycetes
(b) Ascomycetes
(c) Saccharomycetes
(d) Haplomycetes

30. AUG codes for
(a) valine
(b) hiscidine
(c) phenylalanine
(d) methionine

31. Fluid mosaic model of plasma membrane was given by
(a) Robertson
(b) Robert Hooke
(c) Singer and Nicholson
(d) Gorter and Grendel

32. Cell respiration is carried out by
(a) ribosome
(b) mitochondria
(c) chloroplast
(d) Golgi bodies

33. In the lacoperon model, lactose molecules function as
(a) inducers, which bind with the operator gene
(b) repressors, which bind with the operator gene
(c) inducers, which bind with the repressor protein
(d) corepressors, which bind with repressors protein

34. A recessive mutant is one which is
(a) not expressed
(b) rarely expressed
(c) expressed only in homozygous and hemizygous state
(d) expressed only in heterozygous state

35. Humoral immunity system is mediated by
(a) R-cells
(b) T-cells
(c) NK-cell
(d) plasma cells

36. It two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be
(a) both homozygous
(b) one homozygous and other heterozygous
(c) both heterozygous
(d) both hemizygous

37. If the total amount of adenine and thymine in a double•stranded DNA is 60%, the amount of guanine in this DNA will be
(a) 15%
(b) 20%
(c) 30%
(d) 40%

38. The protein products of the following Bt toxin genes cry I Ac and cry II Ab are
responsible for controlling
(a) bollworm
(b) roundworm
(c) moth
(d) fruit fly

39. In a flowering plant, the pollen tube first arrives in
(a) egg
(b) an antipodal cell
(c) a synergid
(d) central cell

Directions (Q. Nos. 40-60) These questions consist of two statements each printed as assertion and reason. Whole answering these questions you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are true and reason is correct explanation of Assertion
(b) If both Assertion and Reason are true but reason is not the correct explanation of Assertion
(c) If Assertion is true but Reason is false
(d) If both Assertion and Reason are false

40. Assertion Only a single functional female gamete is formed from each primary oocyte cell.
Reason Meiosis in each primary as oocyte gives rise to only one cell, which function ovum.

41. Assertion Cytochrome oxidase enzyme contain copper,
Reason Cyanide combines with the copper of cytochrome oxidase and prevents O2 combining with it.

42. Assertion Recognition site should be preferably single and responsive to commonly used restriction enzyme.
Reason In pBR322 alien DNA is ligated generally in the area of Barn HI site of tetracyline resistance gene.

43. Assertion Generally, a woman do nor conceive during lactation period.
Reason The hormone prolacrin initiates and maintain lactation in a woman.

44. Assertion Allelopathy is a form of ammensalism that occurs in plants.
Reason Association of rooting plants with fungal hyphae is an important example ammensalism.

45. Assertion Bats and whales are classified as mammals.
Reason Bats and whales have four chambered heart.

46. Assertion Histamine is related with allergic and inflammatory reactions.
Reason Histamine is a vasodilator.

47. Assertion for a recipient to receive blood from a donar, the recipients plasma must not have an antibody, cause the donor’s cells to agglutinate.

Reason The possibility of blood clumping does not depend on anti A and anti B antibody and blood type.

48. Assertion Monocot stem has collateral open vascular bundle.
Reason Open vascular bundle is without vascular cambium.

49. Assertion Presence of flavin nucleotide is essential for the activity of some enzymes.
Reason Flavin nucleotide is an activator of these enzyme.

50. Assertion Due to excessive use of fertilizers, the available water to the plants becomes hypotonic in relation to cell sap.
Reason The water molecules as a result diffuse out of the cells due to endosmosis.

51. Assertion The nuclear envelope acts as an interface between the genetic component of the cell and the cytoplasm.
Reason It thus protects DNA against the mutagenic effect of cytoplasmic enzyme.

52. Assertion Waxy and earth coating on plant parts reduce the transpiration.
Reason These adaptation are found in xerophytes.

53. Assertion Light is very important factor in transpiration.
Reason It induces stomata! opening and darkness closing. Therefore, transpiration increases in light and decreases in dark.

54. Assertion Mitochondria help in photosynthesis.
Reason Mitochondria have enzymes for dark reaction.

55. Assertion Aflatoions are produced by Aspergillus flowers.
Reason These toxins are useful to mankind.

56. Assertion Histones are basic protein of major importance in packaging of eukaryotic DNA. DNA and histone comprise chromatine forming bulk of eukaryotic chromosome.
Reason Histones are five major types H1, H2A, H2B, H3 and H4.

57. Assertion Photosynthetically C4-plants are less efficient than C3-plants.
Reason The operation of C4-pathway requires the involvement of only bundle sheath cells.

58. Assertion λ SD and marijuan are clinically used as analgesics.
Reason Both these drugs suppress brain function.

59. Assertion Organ transplantation patients are given Immo nosppressive drugs.
Reason Transplanted tissue has antigens, which stimulate the specific immune response of the recepient.

60. Assertion Person suffering from haemophilia fail to produce blood doting factor VIII.
Reason Prothrombin producing platelets in such persons are found in very low concentration.


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