Biology (Raven), 9th Edition

Chapter 6: Energy and Metabolism

Pre-Test

1
Substrate concentration
A)affects reaction rate.
B)increases spontaneously during an exergonic reaction.
C)can be increased indefinitely and the reaction rate will also increase indefinitely.
D)can be lowered to increase the reaction rate.
E)can be increased to decrease the reaction rate.
2
Which of the following statements concerning enzymes is true?
A)Molecular structure does not determine enzyme function.
B)Binding at the active site allows the enzyme to always retain its shape.
C)Enzymes function on their own; they never need cofactors or any sort of regulation.
D)Some enzymes change shape when substrate binds to them.
E)Non-competitive inhibitors compete for the active site.
3
The energy of motion is called
A)Kinetic energy
B)Potential energy
C)Oxidation
D)Reduction
E)Entropy
4
Which of these statements best describes the First Law of Thermodynamics?
A)All of the energy in the universe is going from a more ordered state to a less ordered state.
B)Energy in a closed system can be destroyed.
C)Entropy is always increasing.
D)Energy is never really lost; it just goes from one state to another.
E)As energy is used, more of it is converted into heat.
5
The amount of energy available to break and form chemical bonds is referred to as a molecule's
A)Entropy.
B)Free energy.
C)Activation energy.
D)Catalyst.
E)Reaction energy.
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