THE CELL CYCLE STUDY GUIDE Part II

Once the cell is stimulated to grow and divide ____ factors are activated.

• Internal

• External

When do the internal checkpoints occur during the cell cycle?

• G1

• G2

• M phase

• Sphase

What is programmed cell death?

• apoptosis

• tumor

• mestatasis

• oncogene

When does apoptosis occur?

• damaged or worn out cells

• development

• replication

• cell cycle

What does G1 checkpoint determine?

• cell reached the right size

• has adequate energy

• adequate nutrients

• chromosome replication

• apoptosis

What things are checked during the G2 checkpoint and which one is the most important?

• Size

• Chromosomes are replicated correctly

• adequate energy

• adequate nutrients

What is the last Checkpoint?

• G1

• G2

• S phase

• M (spindle Checkpoint)

What is checked at the M (spindle checkpoint)?

• the spindle fibers are attached at the centromere

• adequate energy

• right size

Uncontrolled cell growth is called ___

• cancer

• tumor

• mastasis

• apoptosis

A mass of cells growing out of control is called a _____

• tumor

• cancer

• oncogene

• metastasis