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Home » Medical Papers » Aptitude Test - 48
Hassan
1.T-lymphocytes recognize antigen and attack microorganisms or transplanted organ and tissues. This effect is called
A. Cell-mediated response
B. Humeral immune response
C. Active immunity
D. Cell-mediated response
2.Which part of antibody recognizes the antigen during immune response?
A. Heavy part
B. Light part
C. Constant part
D. Heavy part
3.What type of immunity is achieved by injecting antibodies, antiserum, anti-venom serum?
A. Active immunity
B. Passive immunity
C. Artificially induced immunity
D. Active immunity
4.Which one of the following glands is involved in the production of lymphocytes?
A. Pineal
B. Pituitary
C. Thymus
D. Pineal
5.Antibodies are proteins and made up of how many polypeptide chains?
A. one
B. Two
C. Three
D. one
6.Oxidative phase of glycolysis starts with dehydrogenation of
A. Glycolysis
B. Ribulose Bisphosphate
C. Glyceraldehyde 3-phosphate
D. Glycolysis
7.In one turn, the Krebs’s cycle produces one molecule of ATP, one molecule of FADH2 and __________ molecules of NADH
A. 1
B. 2
C. 3
D. 1
8.Which one of the following is the stage of cellular respiration for which oxygen is not essential?
A. Glycolysis
B. Pyruvate oxidation
C. Krebs’s cycle
D. Glycolysis
9.Pyruvate, the end product of glycolysis moves from cytosol to mitochondrial matrix where it is oxidized into ___________ producing CO2 as a by-product.
A. Acetic acid (active)
B. Citrate
C. NAD
D. Acetic acid (active)
10.pBr 322 have antibiotic resistance gene for
A. Ampicillin and aspirin
B. Streptomycin and metronidazole
C. Ampicillin and Tetracycline
D. Ampicillin and aspirin
11.Cystic Fibrosis affects which one of the following cells of the body?
A. Epithelial cells
B. Endothelial cells
C. Plasma cells
D. Epithelial cells
12.The enzymes which act as molecular scissors in recombinant DNA technology is
A. Exonucleoses
B. Polymerases
C. Endonucleoses
D. Exonucleoses
13.Which of the following is the correct sequence of PCR?
A. Heating  Cooling  Add Primer  Copying of strand
B. Heating  Add Primer  Cooling  Copying of strand
C. Add Primer  Heating  Cooling  Copying of strand
D. Heating  Cooling  Add Primer  Copying of strand
14.When two different pieces of DNA are joined together, the result is which one of the following?
A. Complementary DNA
B. Recombinant DNA
C. Mutated DNA
D. Complementary DNA
15.Individual successions are known as
A. Primary successions
B. Secondary successions
C. Seres
D. Primary successions
16.Which one of the following is the ultimate distributional unit within which a species is restrained by the limitations of its physical structure and physiology?
A. Niche
B. Ecosystem
C. Biome
D. Niche
17.All herbivores belong to which trophic level in the food chain?
A. T1
B. T2
C. T3
D. T1
18.The relationship in which one organism gets benefit and the other is not affected is called
A. Mutualism
B. Commensalism
C. Predation
D. Mutualism
19.When a gene expresses the effects of a gene at another focus, this is known as
A. Epistasis
B. Co-dominance
C. Complete dominance
D. Epistasis
20.In male the sex determining gene is
A. XY
B. SRY
C. SYX
D. XY
21.A gene which affects two or more unrelated characteristics is called
A. Pleiotropic
B. Epistatic
C. Dominant
D. Pleiotropic
22.Position of a gene within a DNA molecule is
A. Locus
B. Origin
C. Amplicon
D. Locus
23.Sickle cell anemia is a type of
A. Insertion
B. Transposition
C. Deletion
D. Insertion
24.One method of creating an inverted population is known as _________ and consist of illuminating the laser material with light.
A. Optical Pumping
B. Excitation
C. Bremsstrahlung
D. Optical Pumping
25.In population inversion (Ruby Laser) atoms can reside in the excited state for:
A. 10-11
B. 10-8
C. 10-3
D. 10-11
26.In X-ray tube, electrons after being accelerated through velocity ‘v’ strike the target, then the wavelength of emitted X-rays is:
A. Not greater than hc/ eV
B. Not less than hc/ eV
C. Equal to the h /mV
D. Not greater than hc/ eV
27.In the reaction, 92Th 234 → Y 91 234 + -1e 0 the electron e -1 0 emits from the
A. 1st Orbit
B. 2nd Orbit
C. Nucleus
D. 1st Orbit
28.According to the equation ZX A → Y + 3α particles, what are the atomic and mass numbers of ‘Y’?
A. Z – 6, A – 12
B. Z – 2, A – 4
C. Z + 1, A
D. Z – 6, A – 12
29.A certain radioactive nuclide of mass number ‘x’ decays by β-emission and α-emission to a second nuclide of mass number ‘t’. Which of following correctly relates ‘x’ and ‘t’?
A. x = t + 4
B. x = t - 4
C. x – 3 = t
D. x = t + 4
30.Cobalt 60 is used in medicine and is an intense source of:
A. α-particles
B. β-particles
C. γ-rays
D. α-particles
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