Chapter 10, Problem 10.52EP

(a)

Interpretation Introduction

Interpretation: The effect of increase in the concentration of hydrogen peroxide on the rate of the given biochemical reaction has to be predicted.

Concept introduction: If the concentration of an enzyme is kept constant and the concentration of a substrate is increased, then enzyme activity will also increase.  The increase in the enzyme activity is up to a certain substrate concentration and thereafter it remains constant.

(b)

Interpretation Introduction

Interpretation: The effect of decrease in the temperature from its optimum value on the rate of the given biochemical reaction has to be predicted.

Concept introduction: The temperature at which an enzyme shows maximum activity is known as the optimum temperature.

(c)

Interpretation Introduction

Interpretation: The effect of decrease in the concentration of catalase on the rate of the given biochemical reaction has to be predicted.

Concept introduction: If the substrate concentration is kept constant, then the rate of an enzyme-catalyzed reaction will increase with an increase in the concentration of enzyme.

(d)

Interpretation Introduction

Interpretation: The effect of increase in the $\text{pH}$ from its optimum value on the rate of the given biochemical reaction has to be predicted.

Concept introduction: Most of the enzymes exhibit a narrow maximum activity over a narrow $\text{pH}$.  Variations in this $\text{pH}$ range can affect the enzyme activity.  The $\text{pH}$ at which an enzyme shows maximum activity is known as the optimum $\text{pH}$.