Consider the Diagram of a Mitochondrion Shown Below

question 61

Multiple Choice

Consider the diagram of a mitochondrion shown below.What does the number 4 represent?

• A) cristae
• B) matrix
• C) intermembrane space
• D) More than one answer is correct.

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Definitions:

Steroids

A large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms; they include many hormones, alkaloids, and vitamins.

Intracellular Receptors

Proteins located inside the cell that bind to certain substances and initiate a specific cellular response.

First Messenger

A signaling molecule that binds to a receptor on the cell surface, initiating a signal transduction process that leads to the formation of an intracellular second messenger.

Ion Channel

An ion channel is a protein structure embedded in cell membranes that allows ions to pass through the membrane selectively.