Chapter 6, Problem 3STP

Summary Introduction

Introduction:

All living things are chemical factories driven by chemical reactions. A catalyst is a substance that lowers the activation energy needed to start a chemical reaction. Enzymes are the biological catalyst that speeds up the rate of chemical reactions in biological processes. Enzymes are essential to life.

Answer to Problem 3STP

Correct answer :

The correct answer is option (B) function of an active site

Explanation of Solution

Explanation/justification for the correct answer :

Option (B) function of an active site. An active site acts only if it has a certain 3d structure. High-temperature break bonds in an enzyme, which would result in a change in the structure of the active site and would thus, inhibit its function. So, the correct answer is option (B).

Explanation for incorrect answer :

Option (A) behavior as a nonpolar compound. Nonpolar molecules arise when electrons are exchanged equally between atoms in a diatomic molecule, or when polar bonds cancel each other out in a larger molecule. For their activity, they do not require a folded structure. So, this is an incorrect option.

Option (C) movement through cell membranes. Movement through cell membrane requires energy. They do not require a folded structure for their activity. So, this is an incorrect answer.

Option (D) role as energy store for the cell. For energy storage, the folded structure is not essential. So, this is an incorrect answer.