Which of the Following Statements Regarding Exercise Is True

question 14

Multiple Choice

Which of the following statements regarding exercise is true?

• A)The main source of energy during aerobic exercise is ATP from aerobic respiration.
• B)For an activity such as jogging or long-distance running, the primary source of energy is stored ATP and PCr.
• C)During a short burst of activity such as a sprint, the main source of energy is aerobic respiration.
• D)If the demand for ATP outstrips oxygen supply, muscles switch to aerobic fermentation.

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Definitions:

Euchromatin

A loosely coiled chromatin that is generally capable of transcription. Compare with heterochromatin.

Heterochromatin

Heterochromatin is a tightly packed form of DNA, which makes it transcriptionally inactive, contributing to the regulation of genes and maintenance of chromosome structure.

Kinases

Enzymes that catalyze the transfer of phosphate groups from ATP to acceptor molecules. See protein kinases. Compare with phosphatases.

Phosphate Group

A functional group consisting of a phosphorus atom covalently bonded to four oxygen atoms, critical in the structure of nucleic acids and ATP.