WorksheetsAP Biology Campbell Chapter 8
Total questions: 11
Worksheet time: 46mins
Name
Class
Date
1.
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
a)
catalysis
b)
anabolism
c)
dehydration
d)
catabolism
2.
Which of the following is true for anabolic pathways?
a)
They do not depend on enzymes.
b)
They are usually highly spontaneous chemical reactions.
c)
They consume energy to build up polymers from monomers
3.
Whenever energy is transformed, there is always an increase in the...
a)
entropy of the universe
b)
enthalpy of the universe
c)
free energy of the universe
4.
A system at chemical equilibrium...
a)
releases energy at a steady rate
b)
can do no work
c)
consumes energy at a steady rate
d)
has 0 kinetic energy
5.
Allosteric enzyme regulation is usually associated with...
a)
lack of cooperativity
b)
feedback inhibition
c)
an enzyme with more than one subunit
d)
the need for cofactors
6.
The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the pathway is most precisely described as
a)
feedback inhibition
b)
metabolic inhibition
c)
allosteric inhibition
d)
reversible inhibition
7.
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
a)
by binding at the active site of the enzyme
b)
by changing the shape of the enzyme's active site
c)
by changing the free energy change of the reaction
d)
by acting as a coenzyme for the reaction
8.
Which of the following statements is true concerning catabolic pathways?
a)
They combine molecules into more energy-rich molecules.
b)
They are endergonic.
c)
They supply energy, primarily in the form of ATP, for the cell's work.
d)
They are spontaneous and do not need enzyme catalysis.
9.
Why is ATP an important molecule in metabolism?
a)
It provides energy coupling between exergonic and endergonic reactions.
b)
Its hydrolysis provides an input of free energy for exergonic reactions
c)
Its terminal phosphate group contains a strong covalent bond that, when hydrolyzed, releases free energy
d)
It is one of the four building blocks for DNA synthesis
10.
Which of the following metabolic processes can occur without a net influx of energy from some other process?
a)
ADP + Pi → ATP + H₂O
b)
6 CO₂ + 6 H₂O → C₆H₁₂O₆ + 6 O₂
c)
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O
d)
glucose + fructose → sucrose
11.
Which of the following best describes enthalpy (H)?
a)
the total kinetic energy of a system
b)
the heat content of a chemical system
c)
the cell's energy equilibrium
d)
the condition of a cell that is not able to react
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