MCQ on Functions of Enzymes




Enzymes are biological catalysts that accelerate chemical reactions in living organisms. They facilitate processes such as metabolism, DNA replication, and digestion by lowering activation energy. Highly specific, enzymes play crucial roles in maintaining cellular functions and enabling life-sustaining biochemical reactions. This is an MCQ on Functions of Enzymes.

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1. 
Enzymes function primarily as:

2. 
Which of the following best describes the role of enzymes in biological reactions?

3. 
The active site of an enzyme is:

4. 
Enzymes are highly specific in their action, meaning they:

5. 
Coenzymes and cofactors are essential for enzyme function because they:

6. 
What is the term for a substance that can bind to an enzyme and inhibit its activity by competing with the substrate?

7. 
Enzymes can be denatured by:

8. 
Which of the following is NOT a factor that can influence enzyme activity?

9. 
What is the term for the initial interaction between an enzyme and its substrate, where the substrate binds to the active site with weak interactions?

10. 
Enzymes that catalyze the addition of a phosphate group to a molecule are called:

11. 
What is the function of a protease enzyme?

12. 
Enzymes that are present in the digestive system and help break down starch into smaller carbohydrate molecules are called:

13. 
Allosteric regulation of enzymes involves:

14. 
Feedback inhibition is a regulatory mechanism in which the end product of a metabolic pathway:

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