The "Selectivity Filter" in an Ion Channel Is Most Accurately

question 48

Multiple Choice

The "selectivity filter" in an ion channel is most accurately described as a part of the pore that

• A) contains a ring of uncharged residues that interact with specific ions.
• B) contains a ring of charged residues that interact with specific ions.
• C) contains a ring of charged residues that change conformation to either open or close access through the pore for ions.
• D) contains a ring of uncharged residues that change conformation to either open or close access through the pore for ions.
• E) interacts with lipids.

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Definitions:

Performance

Describes the act of carrying out a task or function, often measured against known standards of accuracy, completeness, speed, or efficiency.

Guilt

An unpleasant moral emotion associated with a specific instance in which one has acted badly or wrongly.

Shame

A moral emotion that, like guilt, involves feeling bad but, unlike guilt, spreads to the whole person.

Arousal

A physiological and psychological state of being awake and reactive to stimuli, often involving heightened physical and emotional activity.