The activity of cyclin dependent kinases is regulated by:BTheir concentration inside the cellDTheir concentration outside the cellC Changes in the concentration of cyclinsThe G1, G2 and M checkpointsThe start and end of mitosis

Cyclin dependent kinases (CDKs) are a family of proteins that act as molecular switches to control…

The activity of cyclin dependent kinases is regulated by: A Their concentration inside the cell B с E Their concentration outside the cell Changes in the concentration of cyclins The G1, G2 and M checkpoints The start and end of mitosis

The activity of cyclin dependent kinases is regulated by: A Their concentration inside the cell B с E Their concentration outside the cell Changes in the concentration of cyclins The G1, G2 and M checkpoints The start and end of mitosis

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter6: Reproduction At The Cellular Level

Section: Chapter Questions

Problem 11RQ: FtsZ proteins direct the formation of a ________ that will eventually form the new cell walls of the...

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Question

The activity of cyclin dependent kinases is regulated by:
B
Their concentration inside the cell
D
Their concentration outside the cell
C Changes in the concentration of cyclins
The G1, G2 and M checkpoints
The start and end of mitosis

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Which of the following statements about cyclin-dependent kinases (CDKs) is true? CDKs are produced in the cell only in the presence of specific cyclins CDKs are always present in the cell and are always active CDKs are always present in the cell, but are only active in the presence of a specific cyclin
Which of the following would be expressed at varying levels during different parts of the cell cycle? A. cyclin-dependent kinases B. RNA polymerase C. cyclins D. Glycolysis enzymes
What statement about Cdks/Cyclins below is false? A) Cyclins phosphorylate Cdks B) Cdks are kinases C) Cdk expression is constant during the cell cycle D) Cyclin expression fluctuates during the cell cycle E) Cdk activity fluctuates during the cell cycle
Which of the following is not a part of apoptosis?a. cell shrinkageb. DNA fragmentationc. the manufacture of cellsd. activation of cellular enzymes
An active S-cdk (a type of CDK) will most likely _________ a. degrade cyclin b. promote apoptosis c. prevent the cell cycle d. promote the cell cycle e. prevent apoptosis
The cyclin/cyclin-dependent kinase pair that is active during the M phase of the cell cycle is a.Cyclin A/CDC2. b.Cyclin B/CDC2. c.Cyclin D/CDK4/6. d.Cyclin E/CDK2. e.Cyclin A/CDK2.
What from mitosis is triggered by mitotic CDK inactivationmainly brought about by mitotic cyclin degradation.
Which of the following statements about the M cyclin:CDK are FALSE: It promotes nuclear envelope assembly at the end of M phase It phosphorylates the APC/C to activate it It phosphorylates microtubule binding proteins to promote spindle formation Its activity is regulated by phosphorylation
Cytokinesis typically begins during the ______ stage of mitosis. prophase telophase anaphase metaphase
Which subunits activate CDKs at different cellcycle stages. Cyclins are present only in the cell cycle stagesthat they promote.
A cell begins to undergo apoptosis due to stress. Which of the following are true about this cell? (select all that apply) The cell can exit apoptosis if the stressful factor is removed The cell has high levels of p53. The cell's DNA will inevitably degrade The cell may undergo mitosis before completing apoptosis
What is necessary to make a cleavage furrow during cytokinesis? A. Kinesin "walking" along microtubules B. Myosin filaments shortening C. Actin and myosin-mediated contraction D. All of the above E. None of the above