1. What is TRUE about enzymes?
(a) They make biochemical reactions to proceed spontaneously.
(b) They lower the activation energy of a reaction✅
(c) They are not very specific in their choice of substrates.
(d) They are needed in large quantities.
2. To what category of molecules do enzymes belong?
(a) Carbohydrates
(b)Lipids
(c) Nucleic acids
(d) Proteins✅
3. What is true about cofactors?
(a) Break hydrogen bonds in proteins
(b) Help facilitate enzyme activity✅
(c) Increase activation energy
(d) Are composed of proteins
4. Prosthetic groups are:
(a) Required by all enzymes
(b) Loosely attached with enzymes
(c) Proteins in nature
(d) Tightly bound to enzyme✅
5. When we add more substrate to an already occurring enzymatic reaction and there is no increase in the rate of reaction, what would you predict?
(a) All active sites have been occupied by substrate molecules
(b) The enzyme molecules have denatured✅
(c) More substrate acted as inhibitor
(d) More substrate has disturbed the pH of the medium
7. The substance on which an enzyme act is called:
(a) Cofactor
(c) Coenzyme
(b) Inhibitor
(d) Substrate✅
8. Non-protein part of enzymes are:
(a) Inhibitors
(b) Substrate
(c) Cofactors✅
(d) Coenzymes
9. Optimum temperature for enzymes of human body is:
(a) 86°C
(b) 37°C✅
(c) 38°C
(d) 39°C
10. Activation energy is required to:
(a) activate enzyme
(b) start a reaction✅
(c) speed up a reaction
(d) None
11. Lock and key Model was proposed by:
(a) Emil Fischer✅
(b) Melcher
(c) Koshland
(d) Saugeo
12. Induced Fit model was proposed by:
(a) Emil Fischer
(b) Koshaland✅
(c) Meicher
(d) Saqr
13. Which enzyme breaks the peptide bonds:
(a) Amylase
(b) Protease✅
(c) Lipase
(d) None
14. Which enzyme converts lipids into fattyacid and glycerol?
(a) Lipase✅
(b) Amylase
(c) Pepsin
(d) Trypsin
15. Number of discovered enzymes are:
(a) 200
(b) 2000✅
(c) 3000
(d) 3500
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