2.5 Cell Cycle

Question 1

What is mitosis?

Answer 1

Interphase
G1 – proteins from cell organelles a synthesised
S1 – DNA is replicated
G2 – organelle grow and energy stores increase

Prophase – chromosomes visible
Metaphase – chromosomes line at Equator
Anaphase-spindle fibres pull chromatids apart
Telophase – nuclear envelopes form

Question 2

What is cancer?

Answer 2

Abnormal some growth
Treatment prevents replication of DNA
It also kills healthy cells

Question 3

What is semiconservative replication?

Answer 3

DNA helix please breaks hydrogen bonds between base pairs
Nucleotides are attracted to their complimentary pairs
Nucleotides lineup and joined by DNA polymerases
Two new strands occur