Cellular Respiration Chapter Test

What is the overall reaction for fermentation in yeast?

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7.3

7.5.b

What is the overall reaction for lactic acid fermentation?

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7.3

7.5.b

Only a small part of the energy released from the glucose molecule during glycolysis is stored in ATP. How is the rest of the energy released? (HINT: It is a product in the overall reaction for cellular respiration.)

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7.3

7.5.b

If ATP synthase is enzymatically neutralized within a cell, which of the following consequences would be the most logical outcome?

• Negative feedback will be decreased, causing faster ATP production.

• The electron transport chain will slow down.

• The cell will have no mechanism to make ATP and will die.

• Phosphylation of ADP will decrease.

• All of the above will occur.

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7.3

7.5.b

For one molecule of glucose, what is the maximum number of ATP molecules created directly from the Krebs cycle?

• 1

• 2

• 3

• 4

• 5

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7.3

7.5.b

What is the name of the mechanism by which pyruvate dehydrogenase is inhibited by the endproduct of the biochemical pathway?

• Anabolism

• Catabolism

• Regulation

• Negative inhibition

• Anti-phosphorylation

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7.3

7.5.b

During yeast fermentation, CO2 is produced, but animal cells do not produce CO2. What is the difference in their fermentation strategies?

• Yeast fermentation creates ethanol.

• Animal cells create ATP and ethanol.

• Animal cells do not undergo fermentation.

• Yeast cells ferment pyruvate to lactic acid.

• There is no difference in their fermentation pathways.

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7.3

7.5.b

Which of the following argues most strongly for glycolysis as one of the most primitive biochemical pathway?

• It does not require oxygen in order to function.

• It occurs in the cytoplasm of cells.

• It is exergonic, and therefore obeys the laws of thermodynamics which are fundamental to chemistry and physics.

• This biochemical pathway has been retained by all living organisms.

• There is no evidence that glycolysis is primitive

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7.3

7.5.b

Cellular respiration is

• the utilization of oxygen in a cell.

• the oxidation of organic compounds to extract energy from chemical bonds.

• production of ATP in a cell.

• the conversion of the energy of sunlight to chemical energy.

• reduction of NADH to drive chemical reactions in a cell.

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7.3

7.5.b

Because it has 6 carbons, glucose can power 6 cycles ("turns") of the Krebs cycle

• True

• False

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7.3

7.5.b