which of the following is an example of an external checkpoint of the cell cycle? *\np. g1 checkpoint\nq. g2…

which of the following is an example of an external checkpoint of the cell cycle? *\np. g1 checkpoint\nq. g2 checkpoint\nr. m checkpoint\ns. hormones\nwhich checkpoint tries to make sure that the correct amount of dna (number of chromosomes) is being divided into each cell?\na. g1 checkpoint\nb. g2 checkpoint\nc. m checkpoint\nd. t checkpoint

which of the following is an example of an external checkpoint of the cell cycle? *\np. g1 checkpoint\nq. g2 checkpoint\nr. m checkpoint\ns. hormones\nwhich checkpoint tries to make sure that the correct amount of dna (number of chromosomes) is being divided into each cell?\na. g1 checkpoint\nb. g2 checkpoint\nc. m checkpoint\nd. t checkpoint

Answer

Brief Explanations:

  • For the first question:
    • (G1), (G2), and (M) checkpoints are internal checkpoints of the cell cycle.
    • Hormones are external signals that can influence the cell cycle.
  • For the second question:
    • The (M) checkpoint (also known as the spindle - assembly checkpoint) ensures that chromosomes are properly attached to the spindle fibers and that the correct amount of DNA (number of chromosomes) is being divided into each cell.
    • The (G1) checkpoint checks for cell size, nutrients, growth factors, and DNA damage.
    • The (G2) checkpoint checks for DNA replication completeness and DNA damage.
    • There is no (T) checkpoint in the standard cell - cycle checkpoints.

Answer:

  1. S. Hormones
  2. C. M checkpoint