cell cycle

• what are the three main phases in the cell cycle for eukaryotic cells?

  interphase, mitosis, cytokinesis
• what happens during interphase?

  DNA is replicated and checked for errors, protein synthesis, mitochondria grow and divide
• what are the stages of interphase?

  G0, G1, S, G2
• what are the stages of mitosis?

  prophase, metaphase, anaphase, telophase
• which stage of the cell cycle is the biggest?

  Interphase
• what occurs in G1?

  cell grows and organelles replicate
• what occurs in S phase?

  DNA replication
• what occurs in G2?

  growth and replication of organelles, replicated DNA checked for errors
• what happens if an error is found in the DNA and cannot be corrected?

  cell dies
• what stages does the mitotic phase have?

  mitosis and cytokinesis
• simply, what happens in mitosis?

  nucleus divides
• what happens in cytokinesis?

  cytoplasm divides and two genetically identical daughter cells are produced
• when a cell enters G0 is it temporarily or permanently?

  either
• why may cells enter G0?

  differentiation, DNA error, age
• where are the checkpoints in the cell cycle?

  G1, G2, mitosis
• what does the G1 checkpoint assess?

  cell size, nutrients, DNA errors, growth factors
• what does the G2 checkpoint asses?

  cell size, DNA replication, DNA damage
• where in mitosis does the checkpoint occur?

  metaphase
• what does the metaphase checkpoint assess?

  chromosome attachment to spindle fibres and alignment