Cell cycle
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Questions and Answers

What transition step is the rate limiting and committing step of mitosis?

  • G2/M
  • G1/S (correct)
  • M-to-A phase
  • None of these
  • If there is a problem with DNA replication, where will the cell cycle be held?

  • telophase
  • G2/M (correct)
  • G1/S
  • M-to-A
  • Active G1 complexes trigger a positive feedback loop that leads to active S-cdk complexes and ultimately to DNA synthesis. Activation of which protein makes this happen?

  • RB
  • E2F (correct)
  • cyclin D
  • cyclin A
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