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Home » Medical Papers » UHS MDCAT » Aptitude Test - 34
1.Emission of alpha decay from a radioactive substance causes:
A. Decreases in 'Z' by 4 and decreases in 'A' by 2
B. Decreases in 'A' by 1 and 'Z' remains same
C. Decreases in 'Z' by 1 and 'A' remains same
D. Decreases in 'Z' by 4 and decreases in 'A' by 2
2.Antibodies are produced by which of the following lymphocytes?
A. B lymphocytes
B. A lymphocytes
C. T lymphocytes
D. B lymphocytes
3.10 Joule of energy is absorbed by 10-gram mass from a radioactive source. What is the absorbed dose?
A. 1 gray
B. 1000 gray
C. 10 gray
D. 1 gray
4.T-lymphocytes become mature and competent under the influence of
A. Liver
B. Bursa of fabricius
C. Thymus gland
D. Liver
5.Isotopes are those nuclei of an element that have:
A. Same mass number but different atomic numbe
B. Same mass number as well as atomic number
C. Different mass number as well as atomic number
D. Same mass number but different atomic numbe
6.Skin and mucous membranes are part of the body defense system and they form the
A. Physical barrier
B. Mechanical barriers
C. Chemical barriers
D. Physical barrier
7.Snake bite is treated with which type of immunization?
A. Active
B. Passive
C. Humoral
D. Active
8.Which one of the following emission takes place in a nuclear reaction? 90Th234 91Pa232 + ___
A. Alpha
B. Gamma
C. Beta
D. Alpha
9.The product(s) of cyclic photophosphorylation is / are:
A. ATP
B. NADP
C. NADP and ATP
D. ATP
10.Total NADH formed by one glucose molecule during Krebs’s Cycle are
A. 6
B. 3
C. 8
D. 6
11.The terminal electron acceptor in electron transport chain is
A. Hydrogen
B. Iron
C. Cytochrome
D. Hydrogen
12.Emission of radiation from radioactive substance is:
A. Dependent on both temperature and pressure
B. Independent of temperature but dependent on
C. Independent of both temperature and Pressure
D. Dependent on both temperature and pressure
13.The end product of glycolysis is
A. ADP
B. Reduced FAD
C. Citric acid
D. ADP
14.One molecule of FADH2 is produced in Krebs’s cycle during conversion of
A. Fumarate Malate
B. Succinate Fumarate
C. Malate Oxaloacetate
D. Fumarate Malate
15.In a simple harmonic motion with a radius ‘xo’, the velocity of the particle at any point is:
A. v = ωxo 2 − x2
B. v = ω(x2 − xo 2)
C. v = ω(xo − x)
D. v = ωxo 2 − x2
16.In recombinant DNA technology _________ are tools for manipulating DNA
A. Viruses
B. Chromosomes
C. Enzymes
D. Viruses
17.In DNA finger printing process, the use of __________ produces distinctive pattern on autoradiography or X-ray film
A. Restriction enzyme
B. Microsatellites
C. Macrosatellites
D. Restriction enzyme
18.Hydrogen burns in chlorine to produce hydrogen chloride. The ratio of masses of reactants in chemical reaction is:
A. 1:35.5
B. 2:35.5
C. 1:71
D. 1:35.5
19.In the recombinant DNA technology plasmids are used as
A. Genetic material
B. Enzymes
C. Vectors
D. Genetic material
20.In which process, multiple copies of the desired genes are produced?
A. Polymerase chain reaction
B. Gene sequencing
C. Analyzing DNA
D. Polymerase chain reaction
21.The coordination number of Na+ in NaCl crystal is:
A. 6
B. 2
C. 4
D. 6
22.The enzyme adenosine deaminase is missing in person suffering from:
A. Cystic fibrosis
B. Hypercholesterolemia
C. Severe combined immunodeficiency syndrome
D. Cystic fibrosis
23.What is the niche of an organism in an ecosystem?
A. Role played by many organisms in an ecosystem
B. Role played by a dead organism in an ecosystem
C. Role played by community of microorganisms in their ecosystem
D. Role played by many organisms in an ecosystem
24.The distinct levels or links of food chain are called
A. Trophic level
B. Food web
C. Energy pyramid
D. Trophic level
25.A relationship between two or more organisms of different species in which all partners get benefit is called
A. Symbiosis
B. Parasitism
C. Commensalism
D. Symbiosis
26.Bacteria and fungi are examples of
A. Producers
B. Decomposers
C. Consumers
D. Producers
27.The cause of acid rain is
A. Oxides of carbon
B. Oxides of nitrogen and Sulphur
C. Oxides of Sulphur
D. Oxides of carbon
28.When the presence of a gene at one locus suppresses the effect of a gene at another locus, the phenomenon is called
A. Hypostasis
B. Pleiotropy
C. Epistasis
D. Hypostasis
29.The gene for ABO-blood group systems in humans is represented by symbol:
A. X
B. I
C. Y
D. X
30.When a single gene affects two or more traits, the phenomenon is called
A. Epistasis
B. Pleiotropy
C. Dominance
D. Epistasis
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