Unit 4: Cell Communication & The Cell Cycle Review

Front

What do cells have in order to respond to a particular hormone?

Back

A receptor for the hormone.

Front

Where can receptors for signal molecules be found?

Back

In the plasma membrane and in the cytoplasm/nucleus.

Front

What is the DNA content of a 2n cell in the G1 phase if it is x?

Back

2x in metaphase.

Front

What happens if a cell undergoes mitosis without cytokinesis?

Back

The cell will have more than one nucleus.

Front

What is an example of a negative feedback loop?

Back

Body maintaining a temperature of about 37°C.

Front

What is the role of receptors in cell communication?

Back

Receptors bind to specific signal molecules to initiate a cellular response.

Front

What is the function of protein kinases in signal transduction?

Back

They phosphorylate target proteins to propagate the signal.

Front

What is the significance of the G1 phase in the cell cycle?

Back

It is the phase where the cell grows and prepares for DNA replication.

Front

What is cytokinesis?

Back

The process that divides the cytoplasm of a parental cell into two daughter cells.

Front

What is a positive feedback loop?

Back

A process that amplifies a response or increases the output.