Cell cycle Flashcards
1
Q
What occurs in G1 phase?
A
- performing its normal functions
- growing
- manufacturing additional cytoplasm
- replicating organelles (needed by the daughter cells)
2
Q
What occurs in G1 checkpoint?
A
Cell will only continue if:
- Is the cell size adequate?
- Nutrients/cytoplasm sufficient?
- DNA undamaged?
- Social signals present?
3
Q
What occurs in S phase?
A
DNA molecules of each chromosome are replicated
4
Q
What occurs in G2 phase?
A
growing
- manufacturing additional cytoplasm
- replicating organelles (needed by the daughter cells)
- Shorter duration than G1
5
Q
What occurs in G2 checkpoint?
A
Have chromosomes replicated successfully?
•Is the DNA undamaged?
•Is MPF present?
6
Q
what is MPF
A
MPF = maturation promoting factor -an enzyme needed to initiate mitosis
7
Q
What occurs in M phase?
A
mitosis/meiosis and cytokinesis
