You Strip Off All Proteins on the Cell Surface by Using

question 31

Multiple Choice

You strip off all proteins on the cell surface by using a protease (an enzyme that destroys proteins) . Now, when you add a specific signaling molecule, the cell still responds. Why is this?

• A)The signaling molecule doesn't need a receptor.
• B)The signaling molecule is polar and can diffuse into the cell.
• C)The receptor is in the interior of the cell.
• D)The signaling molecule is nonpolar and binds a cell-surface receptor.

---

Definitions:

Ordinary Sadness

A normal emotional response to undesired circumstances or events, distinct from clinical depression, usually temporary and context-specific.

Specific Phobia

An intense, irrational fear of specific situations, objects, or activities, which can significantly interfere with daily functioning.

Unrealistic Fear

A fear that is disproportionate to the actual risk or threat present in a situation, often based on imagination or speculation rather than fact.

Hallucination

The perception of something not present, such as hearing or seeing something that isn't there, often associated with psychiatric conditions or substance use.