AnswersPA Human Anatomy Physiology A 2026-2027 SMITH ICProteins and Nucleic Acids

Catalysts Answers

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1
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Which two substances bind using a lock-and-key mechanism?

A
enzyme and substrate
B
reactant and substrate
C
substrate and product
D
reactant and product
2
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Which term describes an enzyme?

A
substrate
B
reactant
C
catalyst
D
product
3

Which statement correctly describes a chemical reaction?

A
Reactants come out of a reaction.
B
Energy is always released.
C
Bonds between atoms break and reform.
D
Products go into a reaction.
4

The lock-and-key mechanism refers to

A
the complementary shapes of an enzyme and a substrate.
B
the attractive forces between an enzyme and a substrate.
C
the ability of an enzyme to lower the activation energy of a reaction.
D
the ability of an enzyme to “unlock” the products of a reaction.

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