The proton pump involves the movement of 

A. ADP.
B. hydrogen ions.
C. ATP.
D. All of these answers are true.


B. hydrogen ions.

Biology & Microbiology

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In cells that virtually never divide, in which phase are they apparently locked?

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Which of the following secretes a hormone that

causes its own secretory cells to respond? a. small intestine b. pancreas c. large intestine d. stomach e. liver

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Insufficient production of acetylcholine in the synapses of the brain, abnormal tangled neurons, and large deposits of beta-amyloid are problems associated with which one of the following diseases?

A) meningitis B) Alzheimer's disease C) rabies D) Parkinson's disease E) epilepsy

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The normal microbiota is part of the _______ line of defense.

A. first B. second C. third D. fourth

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