BSCS Biology: A Molecular Approach

Chapter 5: Cell Respiration: Releasing Chemical Energy

The Reactions of Respiration

1.
During what step of the respiration process is pyruvic acid formed?
A)glycolysis
B)the Krebs cycle
C)the electron transport system
D)fermentation
2.
CO2, NADH, FADH2, and ATP are products of which stage of cellular respiration?
A)glycolysis
B)the Krebs cycle
C)the electron transport system
D)fermentation
3.
Which of the following are the principal respiration processes that take place within the mitochondrion, shown here?

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A)glycolysis and the Krebs cycle
B)the Krebs cycle and the electron transport system
C)glycolysis and the electron transport system
D)fermentation and reproduction
4.
The principal role of the electron transport system is to do what?
A)break down glucose
B)produce carbon dioxide
C)ferment pyruvate
D)synthesize ATP
5.
Without oxygen in the respiration process, what happens to the glucose molecule?
A)it remains unchanged
B)it is fermented
C)it is autolyzed
D)it is oxidized
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