G1 phase
What is the purpose of the G1 phase?
Growth
What is the purpose of the S phase?
To replicate DNA
What is made in G2 phase?
Protiens and organelles
what is mitosis?
A type of cell division where a cell divides into two new daughter cells
In the G1 phase, the cell grows physically ___?
Larger
Where does the cell synthesize a complete copy of the DNA?
What is G2 in preparation for?
Mitosis
Do cells need the same or different number of chromosomes as the parent nucleus during mitosis?
Same number of chromosomes
After the cell grows physically larger and copies organelles, the G1 phase makes what?
Molecular building blocks it will need in later steps
When does the S phase occur?
The interphase
What does G2 checkpoint check for?
DNA damage and DNA replication completeness
What happens at the M checkpoint?
The cell examines whether all the sister chromatids are correctly attached to the spindle microtubes.
What is another name for the G1 phase?
First gap phase
What's the name of the microtubule-organizing structure that is duplicated in the S phase?
Centrosome
What happens if damage is detected at the G2 checkpoint?
The cell will pause to allow for repairs.
What is the M checkpoint also known as?
The spindle checkpoint
When does the G1 phase occur?
between the end of cell division in mitosis and the beginning of DNA replication in the S phase
What is the purpose of centrosomes?
Help separate DNA during the M phase
What happens if the damage is irreparable?
The cell may undergo apoptosis,or programmed cell death.
Mitosis will not proceed until?
Mitosis will not proceed until all chromosomes are firmly attached to at least two spindle fibers from opposite polls of the cell.