Which Characteristic Is NOT One Attributed to a Second Messenger

question 73

Multiple Choice

Which characteristic is NOT one attributed to a second messenger?

• A) intracellular signaling molecules
• B) molecules that can easily pass across membrane bilayers
• C) molecules that can act as allosteric effectors for signaling proteins
• D) molecules that can be rapidly converted between active and inactive forms
• E) molecules that are synthesized in response to receptor/signal interactions

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Definitions:

Phospholipids

A class of lipids that are a major component of all cell membranes, essential for cellular function.

Polar (Hydrophilic) Region

A part of a molecule that has a tendency to interact with water through hydrogen bonding or electrostatic interaction, making it soluble in water.

Plasma Membrane

The lipid bilayer that surrounds a cell, providing a barrier and regulating the movement of substances in and out of the cell.

Phospholipids

A class of lipids that are a major component of all cell membranes, forming bilayers that act as a barrier in cells.