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Home » General Knowledge » Aptitude Test - 67
Hassan
1.The monomeric unit of nucleic acid are called?
A. Nucleosides
B. Purines
C. Nucleotides
D. Nucleosides
2.Who discovered nucleic acid?
A. Walter Gilbert
B. Friedrich Miescher
C. Griffith
D. Walter Gilbert
3.Name the pyrimidine base which is found in RNA but not in DNA?
A. Guanine
B. Adenine
C. Uracil
D. Guanine
4.Name those purine bases which are commonly found in DNA and RNA?
A. Adenine and guanine
B. Cytosine and thymine
C. Adenine and thymine
D. Adenine and guanine
5.Which of these statements are TRUE for a glycosidic bond?
A. The bond between sugar and the nitrogenous base
B. The bond between the two sugar residues
C. The bond between sugar and phosphate
D. The bond between sugar and the nitrogenous base
6.What is the energy currency of the living cell?
A. GTP
B. NADH
C. FADH
D. GTP
7.The primary structure of DNA and RNA proceeds in which direction?
A. 3’ —–> 5҆’
B. 5’ —–> 3’
C. 4’ —–> 6’
D. 3’ —–> 5҆’
8.Which bond is used to stabilize the double helix of DNA?
A. Hydrophobic bond
B. Hydrogen bond
C. Covalent bond
D. Hydrophobic bond
9.A purified DNA sample of leaf contains 20.0 mole of guanine. Calculate the approximate percentage of purine residues?
A. 30%
B. 40%
C. 50%
D. 30%
10.Chemical compounds involved in the process of metabolism is known as?
A. Intermediates
B. Catabolites
C. Radicals
D. Intermediates
11.Which of the following has a spiral metabolic pathway?
A. Glycolysis
B. Citric acid cycle
C. Glyoxylate cycle
D. Glycolysis
12.Name the type of the pathway which is involved in the synthesis of compounds?
A. Anabolic pathways
B. Catabolic pathways
C. Amphibolic pathway
D. Anabolic pathways
13.Which of the following cycle shows amphibolic pathway?
A. Glyoxylate
B. Citric acid cycle
C. Glycolysis
D. Glyoxylate
14.Mark the INCORRECT statement about metabolic pathway?
A. They show the irreversible pathway
B. Each one of them has first committed step
C. They follow the only oxidative process
D. They show the irreversible pathway
15.Regulation of metabolic pathway is done by following ways except one, mark the one?
A. Substrate concentration
B. Allosteric regulation of enzymes
C. Availability of oxygen
D. Substrate concentration
16.Which of the following is not an enzyme-catalyzed reaction in metabolism?
A. Isomerization and elimination
B. Internal rearrangement
C. Maillard reaction
D. Isomerization and elimination
17.Name the inhibition where end products of biosynthesis pathway inhibit the activity of the first enzyme?
A. Feedback inhibition
B. Feedback repression
C. Allosteric inhibition
D. Feedback inhibition
18.In which of the following phenomenon the end product act as co-repressor and repress the synthesis of metabolic enzymes?
A. Allosteric regulation
B. Feedback repression
C. Feedback inhibition
D. Allosteric regulation
19.What is Respiration?
A. Intermediate process
B. Catabolite repression
C. Reductive process
D. Intermediate process
20.What is respiratory substrate?
A. The end product of respiration
B. The intermediate compounds of respiration
C. The compounds which are oxidized during respiration
D. The end product of respiration
21.Which of the following condition occur by incomplete oxidation of respiratory substrate?
A. Feedback inhibition
B. Feedback repression
C. Aerobic condition
D. Feedback inhibition
22.Which of the following is not an aerobic reaction?
A. Fermentation
B. Oxidative phosphorylation
C. Citric acid cycle
D. Fermentation
23.Which of these enzymes in glycolysis do not take part in an irreversible reaction?
A. Glucokinase
B. Pyruvate kinase
C. Phosphofructokinase
D. Glucokinase
24.Name the inhibitor of glycolysis?
A. Actinomycin
B. Malonate
C. Iodoacetate
D. Actinomycin
25.Name the site of pyruvate oxidation.
A. Cytosol
B. Mitochondrial matrix
C. Mitochondrial membrane
D. Cytosol
26.How many molecules of Co2 are produced by an acetyl group of acetyl-Co-A in a citric acid cycle?
A. 3
B. 5
C. 1
D. 3
27.Which of the following enzyme is inhibited by Fluoroacetate in Krebs cycle?
A. Citrate synthase
B. Aconitase
C. Isocitrate dehydrogenase
D. Citrate synthase
28.FeS and FAD are the prosthetic groups of?
A. Complex I
B. Complex II
C. Complex III
D. Complex I
29.What is the basic functional and structural unit of organisms?
A. Nucleus
B. DNA
C. Cell
D. Nucleus
30.Name the Scientists who first discovered the cell in the piece of cork?
A. Louis Pasteur
B. Anton van Leeuwenhoek
C. Robert Hooke
D. Louis Pasteur
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