Cell Cycle Regulation

The rate of transition through the cell cycle

Red blood cell formation

DNA replication

ATP synthesis

True

False

Growth factor

Human growth hormone

Cancer

Tumor

kinases and cyclins.

hormones and enzymes.

phosphates and enzymes.

proteins and platelets

Internal regulator

External regulator

Both internal and external regulator

Accessory regulator

Internal regulators only

External regulators only

Both internal and external regulators

Accessory regulators

The S phase is where DNA replication occurs.

The S phase is where cell division occurs.

The S phase is where the cell rests and prepares for division.

The S phase is where the cell undergoes apoptosis.

The G2 phase is where the cell prepares for mitosis.

The G2 phase is where the cell undergoes rapid division.

The G2 phase is where DNA replication occurs.

The G2 phase is a resting phase where the cell has left the cycle and has stopped dividing.

The G1 checkpoint ensures that the cell has sufficient nutrients and energy for the upcoming S phase.

The G1 checkpoint ensures that all chromosomes are properly attached to the mitotic spindle before the cell enters anaphase.

The G1 checkpoint ensures that DNA replication has been completed before the cell enters the S phase.

The G1 checkpoint ensures that the cell has completed cytokinesis before entering the G2 phase.

genetic variation

growth

gamete formation

repair