Cell Cycle And Stages Of Mitosis

Question 1

Interphase

Answer 1

Made up of G1, S and G2
G1 - growth phase, Organelles replicate and makes proteins
(Here some cells can exit and enter G0 where they die, differentiate, or enter senescence (stop dividing)
S- synthesis phase, DNA is replicated (most important genes first
G2- preparing for mitosis, some growth and producing any molecules left to divide

Question 2

Mitosis (General terms)

Answer 2

Process of chromosomes (DNA) separating to each end of the cell

Question 3

Cytokinesis

Answer 3

Cell splits in two daughter cells with identical nuclei

In animals, plasma membrane folds inwards, in plants, cellulose forms at the equator forming an end plate (to separate the two cells)

Question 4

Stages of mitosis order

Answer 4

Prophase metaphase anaphase telophase

Question 5

Prophase

Answer 5

Centrioles duplicate and move to the poles of the cell

Spiracle fibres grow out from centrioles

Question 6

Metaphase

Answer 6

Spiracle fibres pull the chromatids into the middle of the cell and they line up at the equator

Check point here

Question 7

Anaphase

Answer 7

Spiracle fibres (and motor proteins on them) pull the chromatids apart and 1 chromosome to each end of the cell

Question 8

Telophase

Answer 8

Spiracle fibres disintegrate, chromosomes lengthen and become invisible under the microscope and the nuclear envelope begins to reform at each end