If you are looking for the MCQs of Biology 11th class chapter 3 then here we have written all important FSc 1st Year Biology Chapter 3 MCQs pdf Download
I) Tick the Correct Option: (All questions / options - 20 / 0 ) 0 Marks
1. The optimum pH of entering kinase is:
a) 1.50 b) 3.50 c) 5.50 d) 7.50
Correct Answer
5.50
2. If the non-protien part is loosely attached to the protein part is known as:
a) Coenzyme b) Prosthetic group c) Apoenzyme d) Cofactor
Correct Answer
Coenzyme
3. If the co-factor is loosely attached to the protein part, it is known as:
a) Co-enzymes b) Aponezyme c) Holoenzyme d) Activator
Correct Answer
Co-enzymes
4. The optimum pH of Salivary amylase is:
a) 8.80 b) 6.80 c) 4.80 d) 2.80
Correct Answer
6.80
5. Lock and key model was proposed by:
a) Emil Fisher b) Koshland c) Rudolph Virchow d) Lorenz Oken
Correct Answer
Emil Fisher
6. Optimum pH for pancreatic lipase is:
a) 8.00 b) 7.00 c) 9.00 d) 6.00
Correct Answer
9.00
7. If the non-protein part of Enzyme is covalently bonded then it is called:
a) Co-factor b) Activator c) Co-enzyme d) Prosthetic group
Correct Answer
Prosthetic group
8. Reversible inhibitors form Weak linkage with the:
a) Enzyme b) Reactant c) Product d) Substrate
Correct Answer
Enzyme
9. Which one is the essential raw material for coenzymes?
a) Proteins b) Vitamins c) Carbohydrates d) Lipids
Correct Answer
Vitamins
10. An activated enzyme consisting of the polypeptide chain and co-factors is known as:
a) Apoenzyme b) Holoenzyme c) Co-enzyme d) Prosthetic group
Correct Answer
Holoenzyme
11. An activated enzyme consisting of the polypeptide chain and cofactor is called:
a) Apoenzyme b) Activator c) Holoenzyme d) Inhibitor
Correct Answer
Holoenzyme
12. The catalytic activity of the enzyme is restricted to a small portion of the enzyme, known as:
a) Active site b) Catalytic site c) Binding site d) Reacting site
Correct Answer
Active site
13. Optimum pH for enzyme pepsin is:
a) 2 b) 6.80 c) 7 d) 9
Correct Answer
2
14. The optimum temperature for enzyme to work at maximum rate in human is:
a) b) c) d)
Correct Answer
15. Induce fit model was prepared by:
a) Koshland b) Emil Fischer c) Sanger d) Mischer
Correct Answer
Koshland
16. Which type of bond is not form in maintaining the tertiary structure of proteins?
a) Ionic b) Hydrogen c) Disulfide d) Hydrophobic
interaction
Correct Answer
Hydrophobic interaction
17. Induce fit model was proposed by:
a) Emil Fischer b) Koshland c) Jenner d) Pasteur
Correct Answer
Koshland
18. If the nonprotein part is covalently bounded to the enzyme is called as:
a) Co-enzyme b) Prosthetic c) Activator d) Apoenzyme
Correct Answer
Prosthetic
19. The optimum pH for enzyme arginase is:
a) 2.00 b) 9.50 c) 7.60 d) 9.70
Correct Answer
9.70
20. The product of succinic acid by the action of the enzyme is:
a) Fumaric acid b) Malonic acid c) Citric acid d) Pyruvic acid
Correct Answer
Fumaric acid
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