Multiple Choice
Which of the following terms refers to a series of events that ensures cell division occurs?
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16. Cell Division
Control of the Cell Cycle
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Moving ahead with cell division is controlled by the interaction of which of the following?
A
Ribosomes and tRNAs
B
Cyclins and cyclin-dependent kinases (Cdks)
C
Actin and myosin
D
DNA polymerases and helicases
Verified step by step guidance1
Understand the context of the question: The problem is asking about the molecular regulators that control the progression of cell division. This involves understanding the cell cycle and its regulation.
Recall the key regulators of the cell cycle: Cyclins and cyclin-dependent kinases (Cdks) are proteins that work together to regulate the progression of the cell cycle by ensuring that each phase is completed before the next begins.
Eliminate incorrect options: Ribosomes and tRNAs are involved in protein synthesis, not cell cycle regulation. Actin and myosin are involved in cell movement and cytokinesis but do not control the progression of the cell cycle. DNA polymerases and helicases are involved in DNA replication, not the regulation of cell division.
Focus on the correct answer: Cyclins are proteins whose levels fluctuate during the cell cycle, and Cdks are enzymes that become active when bound to cyclins. Together, they form complexes that phosphorylate target proteins to drive the cell cycle forward.
Conclude with the correct interaction: The interaction of cyclins and Cdks is essential for moving ahead with cell division, as they regulate key checkpoints and transitions in the cell cycle.
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Control of the Cell Cycle practice set
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