cell cycle
What are the two main parts of the cell cycle?
Interphase, and mitosis
which are in mitosis?
m
What occurs during the G2 phase of the cell cycle?
cells are growing in preparation for mitosis
what is cell death called
Apoptosis
What do all cells grow from?
1 prexisting cell
what portion is mitosis?
10%
What occurs during interphase?
cells do their normal function and prepare for mitosis
What role do proteins play in the cell cycle?
Proteins regulate the cell cycle and its checkpoints.
why does apoptosis occur
to make sure damaged cells dont replicate
what portion is interphase?
90%
which are in interphase?
g1, s, and g2
what is the purpose of cehckpoints?
to prevent errors (like damaged cells or not working cells from dividing) and make sure everything is working well
what is the G0 phase?
A resting phase where cells are not preparing to divide; many cells, like neurons, spend their whole life in this phase.
what are the 4 steps?
g1, s, g2, m
What occurs during the G1 phase of the cell cycle?
Cells are growing individually, marking the beginning of the cell cycle.
what are the 3 checkpoints and what do they do
1. At G1: Are cells growing well? Any DNA damage? Resources? 2. At G2: Did DNA replicate properly? Is it growing well? 3. At M: Are chromosomes lined up during metaphase?
what do electrons stay in the g0 phase
what occurs during mitosis?
cell division
What occurs during the S phase of the cell cycle?
cell copies dna
What happens if a cell cannot be fixed during the cell cycle/during checkpoints?
Apoptosis (cell death) occurs to prevent irreparable cells from dividing.