Unit 4 Review B

Front

What is a mutation in the context of protein components of the transduction signaling pathway?

Back

A mutation is a change in the DNA sequence that can affect the function of proteins involved in the signaling pathway.

Front

What is the impact of a mutation in the transduction signaling pathway?

Back

It alters the response of the cell.

Front

What are the three parts of a signal transduction pathway?

Back

Reception, transduction, response.

Front

What happens when a ligand binds to its receptor?

Back

There is a conformational change in the shape of the receptor.

Front

What is negative feedback in biological systems?

Back

A mechanism that helps maintain homeostasis by regulating physiological processes.

Front

What is the role of secondary messengers in signal transduction?

Back

They amplify the signal and help relay the message within the cell.

Front

What is a phosphorylation cascade?

Back

A series of chemical reactions in a cell where enzymes add phosphate groups to proteins, often amplifying the signal.

Front

What is the difference between ligands and secondary messengers?

Back

Ligands are signaling molecules that bind to receptors, while secondary messengers are molecules that relay signals inside the cell after the receptor is activated.

Front

What is the significance of receptor-ligand binding?

Back

It initiates the signal transduction pathway, leading to a cellular response.

Front

What is the function of receptors in signal transduction?

Back

Receptors detect signals (ligands) and initiate the transduction process.