1. Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called
Cofactor
Coenzymes
Activator
Enzymes
✅ The correct answer is option D.
Enzymes MCQs
2. Which statement about enzyme is incorrect:
Some of them consist solely of protein with no non-protein part.
They catalyze a chemical reaction without being utilized.
All enzymes are fibrous Proteins.
They without their cofactor are called apoenzyme.
✅ The correct answer is option C.
3. In which of the following location enzymes controlling cellular respiration are present?
Nucleus
Chloroplast
Mitochondria
Ribosome
✅ The correct answer is option C.
4. An activated enzyme consisting of the polypeptide chain and a cofactor is called:
Apoenzyme
Holoenzyme
Activated enzyme
Both B and C
✅ The correct answer is option D.
5. Which one forms the raw material for coenzymes?
Vitamins
Carbohydrates
Proteins
Metals
✅ The correct answer is option A.
6. A cofactor made of inorganic ion which is detachable is called
Prosthetic group
Coenzyme
Activator
Cofactor
✅ The correct answer is option C.
7. Enzymes _________ the activation energy of a chemical reaction
Increases
Decreases
Does not effect
Increases or decreases depending upon individual enzyme
✅ The correct answer is option B.
8. A three-dimensional cavity bearing a specific charge by which the enzyme reacts with its substrate is called
Active site
Binding site
Catalytic site
Allosteric site
✅ The correct answer is option A.
9. Which step causes the activation of the catalytic site of an enzyme?
Change in pH of the surroundings.
Formation of Enzyme Substrate complex.
Change in the charge of the active site.
Change in temperature
✅ The correct answer is option B.
10. Lock and Key model was proposed by
Emil Fischer
Koshland
Robin Williams
Rudolph Virchow
✅ The correct answer is option A.