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 change in the receptor have on cell responses?

Back

A change in the receptor can significantly affect the responses of the cell, altering how it reacts to signals.

Front

True or False: A mutation in a relay molecule can affect the response of a cell.

Back

True. Mutations in relay molecules can disrupt signal transduction pathways.

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 Noncompetitive Inhibition?

Back

A form of enzyme inhibition where the inhibitor binds to an enzyme at a site other than the active site, reducing the enzyme's activity regardless of substrate concentration.

Front

Explain the role of signal transduction in cells.

Back

Signal transduction is the process by which a cell responds to external signals through a series of molecular events, leading to a cellular response.

Front

What is a Receptor in the context of cell signaling?

Back

A protein molecule that receives and responds to signaling molecules, initiating a cellular response.

Front

What is the significance of relay molecules in signal transduction?

Back

Relay molecules are proteins that transmit signals from receptors to target molecules within the cell, amplifying and propagating the signal.

Front

Define the term 'mutation' in biological terms.

Back

A mutation is a change in the DNA sequence that can lead to alterations in protein function and cellular processes.

Front

What is the function of a signaling molecule?

Back

Signaling molecules are substances that transmit information between cells, often initiating a response in target cells.