Zoology, 8th Edition (Miller)

Chapter 31: Energy and Enzymes: Life's Driving and Controlling Forces

Quiz



1.

Because plants capture solar energy they are termed __________ consumers.
A)primary
B)secondary
C)tertiary
D)decomposing
2.

The total of all the chemical reactions occurring in a cell is termed
A)anabolism.
B)catabolism.
C)metabolism.
D)kinetic energy.
3.

A typical food chain consists of
A)primary consumers.
B)secondary consumers.
C)decomposers.
D)all of the above (a-c).
4.

Chemical reactions that occur spontaneously are called
A)endergonic.
B)exergonic.
C)catalysis.
D)positive reactions.
5.

Which of the following is associated with the second law of thermodynamics?
A)entropy
B)all objects in the universe tend to become more disordered
C)the total amount of disorder in the universe is continually increasing
D)all of the above (a-c)
6.

Electrical energy passing through a hot plate to produce heat energy would be a good example of
A)the first law of thermodynamics.
B)the second law of thermodynamics.
C)entropy.
D)all of the above (a-c).
7.

__________ lower the amount of energy required to initiate a chemical reaction.
A)Catalysts
B)Enzymes
C)Ribozymes
D)All of the above (a-c)
8.

When a substrate molecule binds to an enzyme's active site, a(n) __________ forms.
A)product
B)reactant
C)enzyme-substrate complex
D)element
9.

Which of the following is a cofactor?
A)calcium ions
B)copper ions
C)manganese ions
D)all of the above are cofactors
10.

Enzyme activity can be affected by
A)temperature.
B)pH.
C)substrate concentration.
D)all of the above (a-c).
11.

The major energy currency of the cell is
A)ATP.
B)ADP.
C)AMP.
D)DNA.
12.

One of the most important coenzymes in the cell is the hydrogen ion acceptor
A)ATP.
B)NAD.
C)FAD.
D)ADP.
13.

Within their cells, animals make ATP by
A)substrate-level phosphorylation.
B)chemiosmosis.
C)neither a nor b.
D)both a and b.
14.

From an evolutionary perspective, the oldest mode of generating energy is
A)substrate-level phosphorylation.
B)chemiosmosis.
C)oxidative phosphorylation.
D)direct energy transfers.
15.

NAD+ is in its __________ form.
A)oxidized
B)reduced
C)anabolic
D)catabolic
16.

The breaking of one high-energy bond in ATP releases approximately _________ kcal of energy.
A)1
B)5
C)7
D)25
17.

Cells contain a reservoir of ADP and phosphate (Pi) as long as the cell is living.
A)True
B)False
18.

Coenzymes are non-protein, organic molecules that participate in enzyme-catalyzed reactions.
A)True
B)False
19.

The loss of an enzyme's shape is called denaturation.
A)True
B)False
20.

The reactants of enzymatic reactions are called substrates.
A)True
B)False
21.

Kinetic energy is stored energy.
A)True
B)False
22.

Chemical reactions that do not proceed spontaneously are called endergonic.
A)True
B)False
23.

The measure of the degree of disorder or disorganization is called entropy.
A)True
B)False
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