Cell Cycle General

Question 1

M phase

Answer 1

Involves mitosis and cytokinesis

• cell growth stops
• mitosis occurs (PMAT)
• cytokinesis happens

Question 2

G0

Answer 2

Resting phase

• cells undergo differentiation or death
• cells can remain temporarily or permanently

Question 3

Checkpoints

Answer 3

G1/S - checks cell is ready to enter S phase for DNA synthesis/replication
G2/M - checks cell is ready for mitosis or to check if DNA is not mutated

Question 4

Importance of mitosis

Answer 4

• asexual reproduction
• growth of multicellular organisms
• repairing damaged tissue

Question 5

Importance of meiosis

Answer 5

• sexual reproduction
• produces gametes
• involves reduction decision -forms haploid cells (half no of chromosomes)
• cells genetically different from independent assortment and crossing over

Question 6

Interphase (G1, S, G2)

Answer 6

Interphase - period of cell other and DNA replication
G1 - cell grows, organelles duplicate, protein made
S - DNA replicates, (rapid phases as exposed base pairs are more likely to get mutated do reduces mutations)
G2 - cell keeps growing