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- 1. Multiple Choice
Which molecules act as gatekeepers for each checkpoint of the cell cycle?
p53 gene
cyclins and cycline-dependent kinases
thyroid hormones
- 2. Multiple Choice
What is the purpose the the cell cycle checkpoints?
To repair damaged cells before they enter cell division.
To remove damaged cells from an organism.
- 3. Multiple Choice
How many cell cycle checkpoints are there?
1
2
3
4
- 4. Multiple Choice
What is the first checkpoint of the cell cycle?
Mitosis checkpoint
G1 checkpoint
G2 checkpoint
- 5. Multiple Choice
When is apoptosis initiated?
When DNA damage is repaired.
When cells are removed from the cell cycle.
When DNA damage cannot be repaired.
- 6. Multiple ChoiceUncontrolled cell division is stopped by...tumor suppressor genesoncogenes
- 7. Multiple ChoiceWhich is an example of a tumor suppressor gene?apoptosisproto-oncogenesp53oncogenes
- 8. Multiple Choicep53 activates which of the following?Tumor suppressor genescell cycleDNA repair proteinsuncontrolled cell division
- 9. Multiple ChoiceThis is the cell cycle checkpoint that makes sure environmental conditions are ideal for cell survival.G1 CheckpointG2 CheckpointM CheckpointI Checkpoint
- 10. Multiple ChoiceThis is the cell cycle checkpoint that makes sure DNA has been replicated correctly during S phase.G1 CheckpointG2 CheckpointM CheckpointI Checkpoint
- 11. Multiple ChoiceThis is the cell cycle checkpoint that makes sure the correct number of chromosomes are present and attached to microtubules.G1 CheckpointG2 CheckpointM CheckpointI Checkpoint
- 12. Multiple ChoiceThe checkpoints that regulate the cell cycle can fail when ____ becomes damaged.DNACell MembraneMitochondriaRibosomes
- 13. Multiple Choice
Name the 3 checkpoints of the cell cycle
Anaphase checkpoint, mitosis/metaphase checkpoint, and telophase checkpoint
Interphase checkpoint, S phase checkpoint, and M phase checkpoint
G1 checkpoint, G2 checkpoint, and S phase checkpoint
G1 checkpoint, G2 checkpoint, and mitosis/metaphase checkpoint
- 14. Multiple Choice
A disorder in which some of the body's cells lose the ability to control growth.
growth factor
human growth hormone
cancer
tumor
- 15. Multiple Choice
Proteins that direct cells to speed up or slow down the cell cycle.
growth factor
human growth hormone
cancer
tumor
- 16. Multiple Choice
Which one of these is characteristic of cancer cells?
They undergo apoptosis.
They do not respond to growth inhibitors
They respond to growth inhibitors.
- 17. Multiple Choice
Which is a function of cyclins?
Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle.
Cyclins are glycoproteins that repair DNA in the beginning of cell cycle.
Cyclins are proteins that regulate when and how often a cell divides.
- 18. Multiple ChoiceWhich of the following is a type of protein that regulates the cell cycle?actinmyosincyclinpepsin
- 19. Multiple Choice
Cancer promoting substances are called:
Tumors
Carcinogens
Cyclins
Malignant
- 20. Multiple Choice
Which phrase best describes cancer?absence of cyclinsmultiple gene mutationsuncontrolled cell growthprecesnce of genetic defects - Answer choicesTagsAnswer choicesTags