Cell Cycle Regulation

Cell Cycle Regulation

by HEATHER TILTON

Multiple Choice

In order for a tumor to be cancerous to must ...

• Be benign
• Be malignant and metastasize
• Be malignant and not metastasize
• Be benign and spread to parts of the body

Multiple Choice

Cancer creates abnormal cells by disrupting

• the cell cycle
• red blood cell formation
• DNA replication
• ATP synthesis

Multiple Choice

Cancer is

• a premature stop in the cell cycle.
• uncontrolled mitosis.
• programmed cell death.

Multiple Choice

Any substance that is known to cause cancer is called a

• carcinogen
• nicolyte
• pathogen
• retrovirus

Multiple Choice

Any substance that is known to cause cancer is called a

• carcinogen
• nicolyte
• pathogen
• retrovirus

Multiple Choice

Cancer is a consequence of the disruption of the cell cycle

• True
• False

Multiple Choice

Cancer creates abnormal cells by disrupting

• The rate of transition through the cell cycle

• Red blood cell formation

• DNA replication

• ATP synthesis

Multiple Choice

Cancer cells do not pass cell cycle checkpoints, and so they undergo apoptosis and die.

• True

• False

Explanation Slide...

Growth factors are proteins that regulate the cell cycle, either speeding it up or slowing it down. They play a crucial role in controlling cell growth and division.

Multiple Choice

Proteins that direct cells to either speed up or slow down the cell cycle.

• Growth factor

• Human growth hormone

• Cancer

• Tumor

Multiple Choice

Two internal factors that are important in advancing the cell cycle are

• kinases and cyclins.

• hormones and enzymes.

• phosphates and enzymes.

• proteins and platelets

Multiple Choice

Cyclins are an example of:

• Internal regulator

• External regulator

• Both internal and external regulator

• Accessory regulator

Multiple Choice

The cell cycle has:

• Internal regulators only

• External regulators only

• Both internal and external regulators

• Accessory regulators

Multiple Choice

What is the role of the S phase in the cell cycle?

• 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.

Multiple Choice

What is the role of the G2 phase in the cell cycle?

• 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.

Multiple Choice

What is the function of the G1 checkpoint in the cell cycle?

• 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.

Hotspot

Select the correct phase of the Cell Cycle: In this phase the cell checks for errors and prepares for cell division.

Multiple Select

What are the TWO purposes of mitosis? (SELECT TWO)

• genetic variation

• growth

• gamete formation

• repair