Chapter 8, Problem 2CTQ

a.

Summary Introduction

To explain:

Fungi are decomposers still they might use exoenzymes and endoenzymes to feed.

Concept Introduction:

Exoenzyme is an extracellular enzyme which is secreted by the cell. It breaks down cellulose to form smaller glucose molecules. Endoenzyme is an intracellular enzyme which is present inside the cells of fungi. It utilizes the metabolic substrates to produce energy inside the cell.

b.

Summary Introduction

To explain:

Definitions of constitutive enzyme and regulated enzyme with one use of each enzyme within a biological cell.

Concept Introduction:

Enzymes are protein molecules which attain a three-dimensional conformation inside the cell. They contain an active site where the substrate binds and gets converted to form a product. Energy is provided by the use of an ATP molecule.