AP Bio Dec 11 Review

Front

What is the purpose of the G₂ checkpoint in the cell cycle?

Back

To check for cell size and DNA replication.

Front

What are the three components of a nucleotide?

Back

Sugar, phosphate, nitrogen base.

Front

What does cAMP do as a secondary messenger?

Back

Amplifies the original message from the ligand.

Front

What are the three stages of cell signaling?

Back

Reception, transduction, and response.

Front

How is glucose transported into the cell?

Back

Glucose is transported into the cell by active transport.

Front

What is the role of Na+ in cell transport?

Back

Na+ transport out of the cell requires ATP hydrolysis (energy).

Front

What is the function of the cell membrane?

Back

Regulates the movement of ions and molecules in and out of the cell.

Front

Define active transport.

Back

The movement of molecules against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

The movement of molecules across the cell membrane without the use of energy.

Front

What is the significance of DNA replication?

Back

Ensures that each daughter cell receives an identical set of chromosomes.