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End of Chapter Quiz
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1
In animals, the energy for life is obtained by cellular respiration. This involves
A)breaking down the organic molecules that were consumed.
B)b capturing photons from plants.
C)utilizing ATP that was produced by plants.
D)breaking down CO2 that was produced by plants.
2
NAD+ is recycled during
A)glycolysis.
B)fermentation.
C)the Krebs cycle.
D)the formation of acetyl-CoA.
3
During glycolysis, ATP forms by
A)the breakdown of pyruvate.
B)chemiosmosis.
C)substrate-level phosphorylation.
D)NAD+.
4
Which of the following processes can occur in the absence of oxygen?
A)the Krebs cycle
B)glycolysis
C)chemiosmosis
D)all of the above
5
Every living creature on this planet is capable of carrying out the rather inefficient biochemical process of glycolysis, which
A)makes glucose using the energy from ATP.
B)makes ATP by splitting glucose and capturing the energy.
C)phosphorylates ATP to make ADP using the energy from photons.
D)makes glucose using oxygen, carbon dioxide, and water.
6
The electrons generated from the Krebs cycle are transferred to ____________ and then are shuttled to _______________.
A)NAD+ / oxygen
B)NAD+ / electron transport chain
C)NADH / oxygen
D)NADH / electron transport chain
7
The final electron acceptor in lactate fermentation is
A)pyruvate.
B)NAD+
C)lactic acid
D)O2.
8
After glycolysis the pyruvate molecules
A)go to the nucleus of the cell and provide energy.
B)go to the membranes of the cell and are broken down in the presence of CO2 to make more ATP.
C)go to the mitochondria of the cell and are broken down in the presence of O2 to make more ATP.
D)go to the Golgi bodies and are packaged and stored until needed.
9
The vast majority of the ATP molecules produced within a cell are produced
A)during photosynthesis.
B)during glycolysis.
C)during the Krebs cycle.
D)from the electron transport chain.
10
Cells can extract energy from foodstuffs other than glucose because
A)proteins, fatty acids, and nucleic acids get converted to glucose and then enter oxidative respiration.
B)each type of macromolecule has its own oxidative respiration pathway.
C)each type of macromolecule is broken down into its subunits, feed into the oxidative respiration pathway.
D)they can all enter the glycolytic pathway.





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