Cell Cycle

Question 1

Sequences of cell cycle?

Answer 1

Interphase:
G1- intensive cellular synthesis
(S)yntheses- DNA replication
G2- further cellular synthesis

Mitosis- PMAT
Cytokinesis

Question 2

What happens during G1?

Answer 2

• synthesis of mRNA and proteins for DNA replication
• intensive cellular synthesis for form new organelles
• translation
• each chromosome = uncondensed form-> chromatin

Question 3

What happens during S phase?

Answer 3

• DNA replication
• histones are synthesised
• DNA content x2, each chromosome contains two identical DNA molecules in uncondensed form

Question 4

What happens during G2?

Answer 4

• cells continue cellular synthesis with mitochondria synthesis ATP to provide energy for nuclear division
• centrioles replicate-> 2 centrosomes; asters developed