Enzymes Question Preview (ID: 60756)
BIO.A.2.3 Explain How Enzymes Regulate Biochemical Reactions Within A Cell.
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Because they speed up the rates of chemical reactions, enzymes are known as BIOLOGICAL
a) catalysts
b) reactors
c) chemicals
d) rapids
Enzymes are globular proteins. Which of the following accurately identifies the structure of enzymes?
a) primary
b) tertiary
c) quaternary
d) both tertiary and quaternary
High temperatures and extreme pH environments cause the globular structure to unfold during
a) deconstruction
b) transformation
c) denaturation
d) unraveling
Molecules that are acted on by enzymes specifically known as
a) solutes
b) substrates
c) solvents
d) solutions
The _________ is the region on an enzyme to which a substrate binds during an enzyme-catalyzed reaction.
a) activation site
b) allosteric
c) active site
d) action site
Which of the following is NOT a factor that affects the rate of enzymatic reactions?
a) time
b) substrate concentration
c) pH
d) temperature
Enzymes speed up the rates of chemical reactions by lowering
a) kinetic energy
b) potential
c) activation energy
d) thermal energy
What structure is formed once a substrate binds to the active site of the enzyme?
a) substrate-active site complex
b) active enzyme complex
c) enzyme-active site complex
d) enzyme-substrate complex
What are substrates transformed into and released as during an enzyme-catalyzed reaction?
a) catalysts
b) reactants
c) solutions
d) products
Enzymes are changed during enzyme-catalyzed reactions.
a) True
b) False
c)
d)
In addition to temperature, pH, and substrate concentration, what else affects the rate of enzymatic reactions?
a) inhibitors
b) exhibitors
c) solutes
d) reactants
To what category of biological macromolecules do enzymes belong?
a) lipids
b) carbohydrates
c) proteins
d) nucleic acids
Which of the following describes enzyme action as lock and key and induced fit?
a) theories
b) laws
c) hypotheses
d) models
What word describes the fact that an enzyme only acts on certain substrates?
a) semipermeable
b) selectively permeable
c) specificity
d) relationship
What do we call molecules that bind to enzymes but block their activity?
a) exhibitors
b) blockers
c) inhibitors
d) non-enzymes
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