Cell cycle

Cell Cycle

Interphase G1

-Cell grows

-Proteins are produced and organelles replicate

Interphase

S phase

-DNA begins to replicate

-Ends when final chromosome is replicated

-Happens quickly to due risk of exposed bases being affected

Interphase G2

-DNA is checked for errors

-Cell continues to grow

-Proteins are synthesised

-Energy stores increase

Mitotic phase/Cytokinesis

-Energy focused on division

-Nucleus divides (mitosis)

-Cytpoplasm divides to make two cells (cytokinesis)

G0

-Cell leaves the cycle...

-Differentiation- specialised cell is no longer able to divide

-DNA is damaged

-Senescence

G1 checkpoint

-Cell size, nutrients, growth and DNA damage

-Enters G0 if doesnt pass

G2 checkpoint

-Cell size, DNA replication and DNA damage

-Mitosis begins if checks are passed

-If checks aren't passed error is fixed or apoptosis occurs

Metaphase checkpoint

-Checks if chromosome are attached to spindle fibres and are aligned

-Mitosis wont happen until passed checkpoint