Have an account?
Skip to Content
Build your own quiz
Suggestions for you
30 questions
Show Answers
See Preview
- 1. Multiple Choice
Cyclin D.....
triggers cells to move from G0 to G1 and from G1 to S phase. Phosphorylates a protein which is a tumor suppressor.
phosphorylates a target protein which prepares DNA for replication.
in S phase initiates DNA replication and in G2 phase prepares two centrioles for mitosis.
promotes the assembly of the mitotic spindle and other tasks in preparation for mitosis, but inhibits anaphase until the cyclin has been degraded.
- 2. Multiple Choice
Cyclin E.....
triggers cells to move from G0 to G1 and from G1 to S phase. Phosphorylates a protein which is a tumor suppressor.
phosphorylates a target protein which prepares DNA for replication.
in S phase initiates DNA replication and in G2 phase prepares two centrioles for mitosis.
promotes the assembly of the mitotic spindle and other tasks in preparation for mitosis, but inhibits anaphase until the cyclin has been degraded.
- 3. Multiple Choice
Cyclin A.....
triggers cells to move from G0 to G1 and from G1 to S phase. Phosphorylates a protein which is a tumor suppressor.
phosphorylates a target protein which prepares DNA for replication.
in S phase initiates DNA replication and in G2 phase prepares two centrioles for mitosis.
promotes the assembly of the mitotic spindle and other tasks in preparation for mitosis, but inhibits anaphase until the cyclin has been degraded.
- 4. Multiple Choice
Cyclin B.....
triggers cells to move from G0 to G1 and from G1 to S phase. Phosphorylates a protein which is a tumor suppressor.
phosphorylates a target protein which prepares DNA for replication.
in S phase initiates DNA replication and in G2 phase prepares two centrioles for mitosis.
promotes the assembly of the mitotic spindle and other tasks in preparation for mitosis, but inhibits anaphase until the cyclin has been degraded.
- 5. Multiple ChoiceHow does the concentration of cyclin change as a cell goes through the cell cycle?Cyclin concentration remains constant.Cyclin concentration increases during interphase and decreases during mitosis.Cyclin concentration decreases during interphase and increases during mitosis.Cyclin concentration is inversely related to MPF concentrations.
- 6. Multiple Choice
What action do CDKs perform on target proteins?
They make allosteric changes by binding to the protein.
They add a methyl group to the protein.
They remove a methyl group from the protein.
They add a phosphate group to the protein.
They remove a phosphate group from the protein.
- 7. Multiple Choice
Which statement about the relationship between cyclins and CDKs is true?
CDKs activate cyclins.
CDKs repress cyclins.
Cyclins activate CDKs.
Cyclins repress CDKs.
Cyclins and CDKs do not interact.
- 8. Multiple Choice
What type of biomolecule are cyclins?
Carbohydrates
Lipids
Proteins
Steroids
- 9. Multiple Choice
What type of enzymes are kinases?
They add phosphate groups to other biomolecules
They add protein groups to other biomolecules
They add carboxyl groups to other biomolecules
They add amino groups to other biomolecules
- 10. Multiple Choice
What happens to cyclins at the end of their cycle?
They are recycled and used again
They are degraded
They reach a low level and remain there until they are needed, then they increase to their optimum level
They stay at a constant level throughout the cell cycle
- 11. 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
- 12. Multiple ChoiceThe cell cycle is regulated by...cyclinscyclin dependent kinaseshistonescyclin dependent kinases & cyclins
- 13. Multiple Choice
The specific molecular control signal substances in the cytoplasm of cells are proteins known as.....
kinases & cyclins
enzymes & cytosines
helicases & ligases
polymerases & primases
- 14. Multiple ChoiceWhat correctly describes the DNA content in the G2 phase?normal amountdouble amountincreasingdecreasing
- 15. Multiple Choice
In which stage are cells more susceptible to mutations?
G1
S
G2
G0
- 16. Multiple Choice
The cell cycle is made up of 2 main stages, interphase and mitosis. What are the phases of interphase?
Prophase, Metaphase, Anaphase, Telophase
S1, G, S2
G1, S, G2
G1, G0, G2
- 17. Multiple ChoiceSomatic cell 'Q' had a normal mitotic index of 9.3%. However, scientists measured an increase in the mitotic index to 22.7%. This increase could NOT be explained as....a normal increase in cell division due to the cell increasing it's mitotic ratean abnormal increase in cell division due to mutations in the DNAa normal increase in cell division due to damage/death of nearby cellsan abnormal increase in cell division due to the cell 'blowing through' its checkpoints
- 18. Multiple ChoiceThe causes of cancer may include which of the following?chemical carcinogensUV radiationinheritanceall of these
- 19. Multiple Choice
The uncontrolled growth of a cell is due to.....
too many organelles
cells getting too big
cells behaving abnormally
all of the above
- 20. Multiple ChoiceTumors are...A big fatty lumpmass of abnormal cells that can grow uncontrollablySomething that sticks out from your bodyIt's not a tumor
- 21. Multiple ChoiceCancer creates abnormal cells by disrupting....the cell cyclered blood cell formationDNA replicationATP synthesis
- 22. Multiple ChoiceApoptosis is.......programed cell deatha phase of mitosisa type of cancera carcinogen
- 23. Multiple ChoiceTrue or false? Cancer begins when mutations disrupt the normal cell cycle, bypassing the checkpoints, causing cells to divide in an uncontrolled way.TrueFalse
- 24. Multiple ChoiceThe mitotic index shows.....the percentage of cells in a sample that are undergoing mitosisthe percentage of cells in a sample that are undergoing meiosisthe percentage of cells in a sample that have cancerthe percentage of cells in a sample that are in apoptosis
- 25. Multiple Choice
Why does chemotherapy cause nausea and a person's hair to fall out?
The dying tumor cells cause these effects on the body
Chemotherapy kills all rapidly dividing cells in the body
These are effects of the cancer and not from the chemotherapy
The chemotherapy stops all cell division within a cell
- 26. Multiple ChoiceIf a sample of 600 cells has 90 cells in some stage of mitosis, the mitotic index would be....6.67%15%66.7%0.15%
- 27. Multiple Choice
_____________ is the process of malignant cells getting into the circulatory system and establish colonies in other parts of the body.
Tumor
Uncontrolled growth
Cancer
Metastasis
- 28. Multiple Choice
A student view onion cells under a microscope and notices the cells are reproducing by mitosis. Which hypothesis is supported by this?
the cells all have the same chromosomes
the cells each have a unique genetic make-up
the cells produce identical gametes
the cells split to form stem cells
- 29. Multiple Choice
Why are cancer cells not identified by white blood cells?
Because they hide
Because they grow too quickly
Because they look like our own cells
Because they fly by too quickly
- 30. Multiple Choice
Who won the Nobel Prize in 2001 for serendipitously discovering cyclins?
Tim Horton
Tim Hunt
James Hunt
James Watson
- Answer choicesTagsAnswer choicesTags