AP Biology: Unit 4 Review (CED)

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, potentially altering the cell's response.

Front

What is the role of cyclin in the cell cycle?

Back

Cyclin interacts with cyclin-dependent kinase (CdK) to regulate the progression of the cell cycle, particularly to initiate the mitotic phase.

Front

What happens when a ligand binds to its receptor?

Back

The binding of a ligand to its receptor causes a conformational change in the receptor, which can initiate a signaling cascade.

Front

What are the three main parts of a signal transduction pathway?

Back

The three parts are reception, transduction, and response.

Front

What is the significance of signal transduction pathways in cells?

Back

Signal transduction pathways allow cells to respond to external signals, leading to various cellular responses such as growth, gene expression, and secretion.

Front

What is the function of a receptor in a signal transduction pathway?

Back

A receptor binds to a specific ligand, initiating the signal transduction process.

Front

What is the role of phosphorylation in signal transduction?

Back

Phosphorylation is a common mechanism that activates or deactivates proteins in the signaling pathway, thereby regulating cellular responses.

Front

What is the difference between a primary messenger and a secondary messenger?

Back

A primary messenger (like a hormone) binds to a receptor, while a secondary messenger (like cAMP) relays the signal inside the cell.

Front

What is the outcome of a malfunctioning receptor in a signaling pathway?

Back

A malfunctioning receptor can lead to improper cellular responses, potentially resulting in diseases such as cancer.

Front

How do cells amplify signals in a signaling pathway?

Back

Cells amplify signals through a cascade of reactions, where one activated molecule can activate multiple downstream molecules.