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AP Biology – Enzymes UPDATED ACTUAL Exam Questions and CORRECT Answers
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AP Biology – Enzymes UPDATED ACTUAL Exam Questions and CORRECT Answers Metabolism - CORRECT ANSWER - the totality of an organism's chemical reactions Metabolic Pathway - CORRECT ANSWER - begins with a specific molecule which is then altered through a series of defined steps to create a produ...

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  • February 12, 2025
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  • 2024/2025
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Ap Biology Unit 4: Enzymes UPDATED
ACTUAL Exam Questions and CORRECT
Answers
In living cells the rate of uncatalyzed chemical reactions is very slow, largely because...
a. too few reactants are present in the same region at the same time
b. cellular temperatures are too high to permit the proper alignment of potential reactants
c. colliding molecules do not reach a reactive transition state
d. cellular enzymes block the active sites on substrates
e. the transport rate of reactants into cells is too slow to permit the rapid interaction of reactants -
CORRECT ANSWER - c.


.Noncompetitive inhibitors of an enzyme...
a. are chemically similar to the enzyme.
b. are chemically similar to the substrate.
c. bind to and destroy the substrate(s).
d. bind to the enzyme at its active site.

e. bind to an enzyme at sites other than its active site. - CORRECT ANSWER - e.


A competitive inhibitor of an enzyme is one which is...
a. chemically similar to the enzyme.
b. chemically very different than the normal substrate(s).
c. chemically similar to the enzyme's normal substrate.

d. chemically very different than the enzyme. - CORRECT ANSWER - c.


A primary means of regulating metabolic processes by using the products formed to slow
chemical activity is termed...
a. cyclic inhibition.

, b. regulatory inhibition.
c. metabolic equilibrium.
d. negative feedback control.

e. positive feedback control. - CORRECT ANSWER - d.


Prosthetic groups are usually attached to the protein enzyme by...
a. hydrogen bonds only.
b. covalent bonds only.
c. ionic bonds only.
d. only hydrogen or ionic bonds.

e. either hydrogen, ionic, or covalent bonds - CORRECT ANSWER - b.


An allosteric enzyme is...
a. one in which its substrate binds to a regulatory site.
b. usually the last enzyme in an enzymatic pathway.
c. one in which an inhibitor molecule binds to its active site.
d. one in which an inhibitor molecule binds to its regulatory site.
e. an enzyme designed to provide positive feedback control of a pathway. - CORRECT
ANSWER - d.


The maximum velocity (Vmax) of a particular enzyme is primarily determined by 1. how rapidly
an enzyme can process bound substrate. 2. the number of substrate molecules present in a
solution. 3. the number of enzyme molecules present in a solution. 4. the molecular weight of the
enzyme.
a. 1 only
b. 2 only
c. 3 only
d. 4 only

e. 2 and 3 - CORRECT ANSWER - a.

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