Question

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Metabolic reactions are necessary for the body to function and maintain homeostasis. Which of the following statements describes an enzyme’s role in these reactions?

A. Enzymes are formed into lipids.

B. Enzymes are catalysts that lower the activation energy allowing the reaction to occur.

C. Enzymes are used up as a part of the reaction and cannot be used again.

D. Enzymes can be any shape to bind to the substrate.

Answer 1

The correct answer is B.  Enzymes are catalysts that lower the activation energy allowing the reaction to occur.

Enzymes are biological catalysts which accelerate chemical reactions(reactions are millions of times faster than without them). Every enzyme has an active site which binds substrates and converts them into products. Binding to the substrate, enzyme changes its shape.