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Enzymes: Biological Catalysts Quiz

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Questions and Answers

What is the function of enzymes in biochemical reactions?

They have no effect on the rate of reactions

They speed up the rate of reactions (correct)

They slow down the rate of reactions

They undergo changes during reactions

What are enzymes also known as?

Biological reactors

Biological inhibitors

Biological catalysts (correct)

Biological stabilizers

Where are enzymes found in the body?

Only in the circulatory system

Only in the plasma membrane

Only in metabolic pathways

In all tissues and fluids of the body (correct)

What is the role of intracellular enzymes?

Carry out all reactions in metabolic pathways Signup and view all the answers

What is the small region of the enzyme where it interacts with its substrates called?

Active site Signup and view all the answers

What is the main impact of enzymes on metabolic processes?

Accelerating the rate and specificity of metabolic reactions Signup and view all the answers

What is an active site in an enzyme?

A region of the enzyme that holds specific substrate molecules through intermolecular forces Signup and view all the answers

What happens when the substrate binds to the active site of an enzyme?

The enzyme-substrate complex is formed Signup and view all the answers

What do enzymes do in a chemical reaction?

Increase the rate of the reaction Signup and view all the answers

What is true about enzyme activity?

It varies in response to substrate concentration or other molecules Signup and view all the answers

What is the primary composition of most enzymes?

Proteins Signup and view all the answers

What are ribozymes?

Specialized RNA molecules with catalytic activity Signup and view all the answers

What is necessary for the catalytic activity of an enzyme?

Amino acid residues only Signup and view all the answers

What is true about denatured enzymes?

They do not have catalytic activities Signup and view all the answers

What does the term 'apoen' refer to?

An enzyme without its cofactor Signup and view all the answers

What do many enzymes depend on for their catalytic activity?

Small molecules termed cofactors Signup and view all the answers