Enzymology MCQ with answers pdf

MCQ on Enzymology: In this blog post, Enzymology MCQs are provided with answers. Answers to all the Multiple Choice Questions are bold.

Top 20 Enzymology MCQs with answers

The term enzyme was coined by ———————- 

a) F. W. Kuhne 

b) Emil Fischer 

c) James Sumner 

d) Maud Menten 

2. The first enzyme to be crystallized is —————– 

a) Trypsin 

b) Catalase 

c) Urease 

d) Chymotrypsin 

3. Name the first enzyme whose amino acid sequence is completely deduced?  

a) Trypsin 

b) Catalase  

c) lysozyme  

d) bovine pancreatic ribonuclease  

4. Antibodies with catalytic activity are termed as———- 

a) Isozymes 

b) Ribozymes 

c) abzymes 

d) Exo-enzymes 

5. Lysosomal enzymes are synthesized in  

a) Ribosome 

 b) nucleus  

c) endoplasmic reticulum  

d)Golgi apparatus 

6. Electron transport chain and ATP synthesis occurs at 

a) Ribosome  

b) endoplasmic reticulum  

c) mitochondria  

d) cytoplasm 

7. NADPH cytochrome C reductase and glucose 6 phosphatase are known to be the marker of 

a) Ribosome  

b) nucleus 

 c) endoplasmic reticulum  

d) Golgi apparatus 

8. The disulfide linkage is formed by the coupling of two sulfur atoms of two —- amino acids 

a) proline 

 b) cysteine  

c) glutamic acid  

d) tryptophan 

9. The structure in which amino acids joined by peptide bonds in a linear amino acids chain is known as 

a) Primary structure  

b) secondary structure  

c) tertiary structure  

d) quaternary structure 

10. Alpha helix and beta sheets can be seen in 

a) Primary structure  

b) secondary structure  

c) tertiary structure  

d) quaternary structure 

11. What does the active site of the enzyme bind to? 

a. Substrate 

b. Lipase  

c. Carbohydrates  

d. Proteins 

12. What is the definition of an enzyme 

a. Enzymes are a biological catalyst.  

b. Enzymes help with the digestive process. 

c. Enzymes break down chemicals in the body. 

d. Necessary to sustain life. 

13. Enzymes increase the rate of a chemical reaction through which of the following means? 

a. reducing the number of products     

b. reducing the activation energy 

c. increasing the temperature of the cell  

d. increasing the concentration of reactants  

14. The coenzyme that participates in acyl group transfer is —————–.  

a) Biotin 

b) Co A 

c) NADH  

d) thiamine pyrophosphate 

15. The coenzyme that is involved in transamination reaction is————-.  

a) Tetrahydrfolate 

b) Acyl carrier protein  

c) Co A  

d) Pyridoxal phosphate 

16. The coenzyme involved in carboxylation reaction is ———. 

a) Biotin  

b) Co A  

c) Pyridoxal phosphate  

d) FADH 

17. The vitamin precursor of the coenzyme FAD is ———-. 

a) Ascorbic acid  

b) Tocopherol  

c) Riboflavin  

d) Cyanocobalamin 

18. —————– functions as a mobile electron carrier between complex I and II and cytochrome b of the mitochondrial electron transport chain.  

a) Coenzyme Q  

b) NADH  

c) FAD  

d) Pyridoxine 

19. The cofactor that serves as methyl group donor in the formation of adrenalin is —–. 

a) Lipoic acid  

b) UDP Glucose  

c) S-adenosyl methionine  

d) ATP 

20. The metal ion that serves as cofactor of carbonic anhydrase……………… 

a) Mn2+  

b) K+  

c) Mg2+  

d) Zn2+ 

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