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1

An atom gains energy when
A)an electron is lost from it.
B)it undergoes oxidation.
C)it undergoes reduction.
D)it undergoes an oxidation-reduction reaction.
2

Which of the following is concerned with the amount of energy in the universe?
A)the First Law of Thermodynamics
B)the Second Law of Thermodynamics.
C)thermodynamics
D)entropy
3

In a chemical reaction, if ΔG is negative, it means that
A)the products contain more free energy than the reactants.
B)an input of energy is required to break the bonds.
C)the reaction will proceed spontaneously.
D)the reaction is endergonic.
4

A catalyst
A)allows an endergonic reaction to proceed more quickly.
B)increases the activation energy so a reaction can proceed more quickly.
C)lowers the amount of energy needed for a reaction to proceed.
D)is require for an exergonic reaction to occur.
5

Which of the following statements about enzymes is false?
A)Enzymes are catalysts within cells.
B)All the cells of an organism contain the same enzymes.
C)Enzymes brings substances together so they undergo a reaction.
D)Enzymes lower the activation energy of spontaneous reactions in the cell.
6

A multienzyme complex contains
A)many copies of just one enzyme.
B)one enzyme and its substrate.
C)enzymes that catalyze a series of reactions.
D)side reactions on a substrate.
7

Which of the following has no effect on the rate of enzyme-catalyzed reactions?
A)temperature
B)pH
C)concentration of substrate
D)none of these
8

How is ATP used in the cell to produce cellular energy?
A)ATP provides energy to drive exergonic reactions.
B)ATP hydrolysis is coupled to endergonic reactions.
C)A liberated phosphate group attaches to another molecule, which generates energy.
D)ATP generates energy by the repulsion of the negatively-charged phosphates.
9

Anabolic reactions are reactions that
A)break chemical bonds.
B)make chemical bonds.
C)harvest energy.
D)occur in a sequence.
10

How is a biochemical pathway regulated?
A)The product of one reaction becomes the substrate for the next.
B)The end product replaces the initial substrate in the pathway.
C)The end product inhibits the first enzyme in the pathway by binding to an allosteric site.
D)All of these are correct.







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