AP Bio Insta-Review Topic 4.4*: Changes in Signal Transduction

Front

What is a Competitive Inhibitor?

Back

A type of enzyme inhibitor that binds to the active site of an enzyme, preventing the substrate from binding.

Front

What effect does a mutation in a relay molecule have on signal transduction?

Back

It can affect the response of the cell, potentially leading to altered cellular functions.

Front

How can a change in the receptor affect cellular responses?

Back

A change in the receptor can alter how a cell responds to signals, impacting processes like growth, metabolism, and apoptosis.

Front

Define Allosteric Inhibitor.

Back

An inhibitor that binds to a site other than the active site on an enzyme, causing a change in the enzyme's shape and function.

Front

What is a Noncompetitive Inhibitor?

Back

An inhibitor that binds to an enzyme regardless of whether the substrate is bound, reducing the overall number of active enzyme molecules.

Front

Explain the role of signal transduction in cells.

Back

Signal transduction is the process by which a cell responds to external signals, leading to a series of cellular responses.

Front

What is the significance of receptor specificity in signal transduction?

Back

Receptor specificity ensures that only certain signals can activate specific pathways, allowing for precise cellular responses.

Front

What is the function of a Repressor Inhibitor?

Back

A type of inhibitor that decreases gene expression by binding to the operator or promoter region of a gene.

Front

How do mutations in signaling pathways affect cellular communication?

Back

Mutations can disrupt normal signaling, leading to diseases such as cancer or metabolic disorders.

Front

What is the difference between direct and indirect signaling?

Back

Direct signaling involves cell-to-cell contact, while indirect signaling uses signaling molecules that travel between cells.