Mitosis

Question 1

Why does mitosis take place?

Answer 1

To replicate cells that can grow and repair

Question 2

What is mitosis?

Answer 2

The division of the nucleus to make exact copy of the DNA in a parent cell apart from rare cases (mutations), the two daughter cells are not identical to the parent cell.

Question 3

PMAT is…

Answer 3

Prophase, Metaphase, Anaphase and Telophase

Question 4

Prophase is when…

Answer 4

Nuclear envelope disappears and the chromosomes become visible. The centrioles move to opposite sides

Question 5

Metaphase is when…

Answer 5

Chromosomes arrange themselves at the equator of the cell and the spindle fibres released from the poles now attach to the centromere and chromatid.

Question 6

Anaphase is when…

Answer 6

The two threads of a chromosome (chromatids) migrate to opposite ends of the cell so the chromosomes split in half into chromatids. This phase requires energy from ATP which is provided by respiration from the mitochondria.

Question 7

Telophase is when…

Answer 7

The two nuclear envelopes reform

Question 8

3 sections of the cell cycle…

Answer 8

1. Interphase
2. Mitosis
3. Cytokenisis

Question 9

3 phases of interphase (cell cycle)

Answer 9

1. G1 (longest phase) - all organelles in the cell double and the cell itself will grow in size for prep of new cell.
2. S phase - where DNA replication happens.
3. G2 - still growth but the DNA being replicated is checked for mutations, if mutations are found the cell destroys itself at that point to prevent any further damage