a1101_biological

Question 1 of 4

Animation Assessment

Question

Animal cells regenerate most ATP by the process(es) of:

Chloroplast photosynthesis

Mitochondrial respiration

Photosynthesis and respiration

Activation of a P-class ATPase pump

None of the above

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Question

In the transition of the Na⁺/K⁺ ATPase from the E1 state to the E2 state:

The affinity of the Na⁺ sites for binding Na⁺ ions decreases and the affinity of the K⁺ sites for binding K⁺ ions increases

Only the affinity of the Na⁺ sites for binding Na⁺ ions increases; the affinity of the of the K⁺ sites for binding K⁺ ions remains constant

None of the above

The affinity of the Na⁺ sites for binding Na⁺ ions increases and the affinity of the K⁺ sites for binding K⁺ ions decreases

The affinities of both Na⁺ and K⁺ sites remain constant

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Question

For each ATP hydrolyzed, the Na⁺/K⁺ ATPase:

Transports 3 Na⁺ ions out of the cell and 2 K⁺ ions into the cell to establish concentration gradients for both ions

Transports 3 Na⁺ ions into the cell and 2 K⁺ ions out of the cell to establish concentration gradients for both ions

None of the above

Transports 3 Na⁺ ions out of the cell; transport of 2 K+ ions into the cell requires hydrolysis of another ATP

Transports 3 Na⁺ ions out of the cell and 2 K⁺ ions out of the cell to establish an electrical potential across the membrane.

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Question

Certain drugs such as oubain and digoxin inhibit Na⁺/K⁺ ATPase activity. What effect would these drugs have on the transport of glucose into cells against a high concentration gradient by a symporter?

None of the above

The Na⁺ gradient across the membrane would decrease causing glucose transport into the cell to increase

The Na⁺ gradient across the membrane would decrease, but glucose transport into the cell would remain constant

The K⁺ gradient across the membrane would drive glucose transport into the cell

The Na⁺ gradient across the membrane would decrease causing glucose transport into the cell to decrease

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Chapter 11. Biological Energy Interconversions

Animation Assessment

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