AP Biology Cell Communication Quiz

Which of the following is the first step in cell signaling?

A signaling molecule that binds to a receptor is called a:

Steroid hormones usually bind to receptors located:

Which type of signaling occurs when a cell targets itself?

What is the primary function of signal transduction?

Which molecule commonly acts as a second messenger?

G-protein-coupled receptors (GPCRs) are associated with:

Which signaling type involves hormones traveling through the bloodstream?

Protein kinases function by:

Which receptor type directly opens or closes ion channels?

Amplification in a signaling pathway means:

Receptor tyrosine kinases are activated by:

Which of the following is NOT a second messenger?

A mutation preventing receptor binding would most directly affect:

In signal transduction, phosphorylation cascades often involve:

What is apoptosis?

Which of the following best describes paracrine signaling?

Nitric oxide (NO) is an example of a:

Why do cells respond differently to the same signal molecule?

Which characteristic is shared by all receptor proteins?