Biology Chapter 9

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Which of the following cellular metabolic processes is active in all cells, regardless of the presence or the absence of oxygen?
A. The citric acid cycle
B. Electron transport
C. Glycolysis
D. Fermentation
E. Pyruvate oxidation

C. Glycolysis

Which of the following statements regarding glycolysis is false?
A. A 6-C sugar is broken down to two 3-C molecules.
B. Two ATP molecules are consumed.
C. Glycolysis requires oxygen.
D. A net sum of two ATP molecules is generated.
E. Glycolysis occurs in the cytosol.

C. Glycolysis requires oxygen

Cellular respiration is allosterically controlled. Which of the following act(s) as inhibitors at the various control points?
A. ATP
B. NADH
C. Both ATP and NADH
D. ADP
E. Both ADP and NADH

C. Both ATP and NADH

Which of the following statements about redox reactions is true?
A. Oxidizing agents accept electrons.
B. Oxidizing agents donate electrons.
C. A molecule that accepts electrons is said to be oxidized.
D. A molecule that donates electrons is said to be reduced.
E. Oxidizing agents accept electrons and are reduced in the process.

E. Oxidizing agents accept electrons and are reduced in the process

Cyanide poisoning inhibits aerobic respiration at cytochrome c oxidase. Which of the following is not a result of cyanide poisoning at the cellular level?
A. Reduction of oxygen to water
B. Cessation of ATP synthesis in the mitochondria because electron transport is never completed
C. Switching of cells to anaerobic respiration and fermentation if possible
D. Continuation of glycolysis as long as NAD+ is available
E. Less acidic pH of the intermenbrane space

A. Reduction of oxygen to water

The main function of cellular respiration is the...

conversion of energy stored in the chemical bonds of glucose to an energy form that the cell can use

Which of the following does not occur in the mitochondria of eukaryotic cells?
A. Fermentation
B. Oxidative phosphorylation
C. Citric acid cycle
D. Electron transport chain
E. Creation of a proton gradient

A. Fermentation

For each molecule of glucose, how many ATPs are synthesized in fermentation?

2

Oxidation-Reduction Reactions: Which of the following statements regarding the oxidation-reduction reaction shown here is true?
A. Reactant A is the oxidizing agent.
B. Reactant B is oxidized.
C. Reactant B is the reducing agent.
D. Both oxidation and reduction occur together.
E. In the reverse reaction, reactant B is the oxidizing agent.

D. Both oxidation and reduction occur together

During which process is the most ATP generated in the cell?

Electron transport coupled with chemiosmosis

In the following redox reaction, _______ is oxidized and _______ is reduced.
Glyceraldehyde 3-phosphate (G3P) + NAD+ + H+ + Pi → 1,3-Bisphosphoglycerate (BPG) + NADH

G3P; NAD+

Which of the following is recycled and reused in cellular metabolism?
A. ADP
B. NAD+
C. FAD
D. Pi
E. All of the above

E. All of the above

Which of the following is correctly matched with its catabolic product?
A. polysaccharides → amino acids
B. lipids →?glycerol and fatty acids
C. proteins → glucose
D. polysaccharides → glycerol and fatty acids
E. nucleic acids →?monosaccharides

B. lipids →?glycerol and fatty acids

Energy Yield: The growth rate of a yeast using glucose as an energy and carbon source would likely _______ when the culture was shifted from aerobic to anaerobic conditions; the rate of utilization of glucose would _______ after the transition.
A. increase; decrease
B. decrease; decrease
C. stay the same; increase
D. increase; stay the same
E. decrease; increase

E. decrease; increase

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