NCERT Class 11 Biotechnology Book Chapter 4 Answer English Medium | Enzymes and Bioenergetics | NCERT Class 11 Biotechnology Book Chapter 4 Book Questions and Answer Solutions English Medium |

Chapter 4

Enzymes and Bioenergetics

Exercises

1. In order to catalyse a reaction, an enzyme is required to

(a) be saturated with substrate

(b) decrease the activation energy

(c) increase the equilibrium constant

(d) increase the activation energy

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2. Pepsin is a gastric enzyme. Does it have an acidic or alkaline optimum pH? What happens to pepsin when it enters the duodenum?

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3. What is the relationship between vitamins and enzyme co-factors?

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4. What is the effect of temperature, pH and substrate concentration on catalytic activity of enzyme?

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5. The rate determining step of Michaelis-Menten kinetics is

(a) the complex dissociation of ES complex

(b) the complex formation

(c) the product formation

(d) the product degradation

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6. Define Km and its significance.

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7. What is meant by one unit of enzyme?

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8. What is specific activity of an enzyme?

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9. Briefly describe first and second laws of thermodynamics.

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10. Define entropy. What is the relationship between free energy and entropy?

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11. Why ATP is called universal energy currency?

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