quiz Scienze della vita · 10 questions

Cell Cycle Regulation and Extracellular Signals

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1

Which checkpoint ensures that DNA damage is repaired before mitosis proceeds?

2

What is the primary effect of mitogenic factors on cyclin‑Cdk complexes?

3

Why do mature hippocampal neurons undergo apoptosis when deprived of survival factors?

4

Which of the following best describes the role of the APC/C complex during mitosis?

5

In the context of neuronal development, what molecular change characterizes the transition to a permanent post‑mitotic state?

6

How does the tumor suppressor p53 influence the cell cycle when DNA damage is irreparable?

7

Which extracellular factor specifically stimulates proliferation of erythroid precursors?

8

During the G1 phase, which event is most variable among different cell types?

9

What is the consequence of PDGF binding to its receptor on a fibroblast?

10

Which mechanism primarily desensitizes cells to continuous exposure to a ligand?

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