cell cycle

• The cell cycle consist of 3 key stages : interphase (G1, S, G2), nuclear division (mitosis, meiosis), and cytokinesis
• G1 phase is the first growth phase where the cell grows and lots of protein synthesis occurs and new organelles are synthesise
• what are the 3 checkpoints in the cell cycle called?

  G1 checkpoint, G2 checkpoint and metaphase checkpoint
• What are the purposes of checkpoints?

  1> To prevent uncontrolled cell division which could lead to tumours

  2> to detect and repair damage to DNA

  3> ensures cell cycle isn't reversed

  4> ensures DNA is replicated
• In M phase, the cell divides by mitosis or meiosis.
• During interphase each chromosome is copied to form two sister chromatids joined at a centromere
• during the S phase DNA is replicated and checked for mutations
• G2 phase is when cell continues to grow and newly replicated dna is checked for errors