Mitosis

Question 1

What are the three first sub stages in the cell cycle (interphase)

Answer 1

G1-growth
S-synthesis
G2-preparation

Question 2

What is the 1st stage of mitosis

Answer 2

Prophase - centrioles move to opposite ends of cell and fibres extend to form mitosis spindle - chromosomes visible

Question 3

What is the second stage of mitosis?

Answer 3

Metaphase - spindle fibres align chromosomes along cell equator

Question 4

What is the third stage of mitosis?

Answer 4

Anaphase - paired chromosomes separate at centromeres - sister chromatids on opposite sides

Question 5

What is the fourth stage of mitosis?

Answer 5

Telophase - chromosomes no longer visible- chromatids at either pole of cell and nuclear membrane around daughter nuclei

Question 6

What happens in the last stage of mitosis?

Answer 6

Cytokinesis - fibre ring composed of actin (protein) forms around centre of cell and contracts to pinch cell into two daughter cells

Question 7

What is G1?

Answer 7

Biosynthesis for rapid growth and organelles and proteins are synthesised

Question 8

What is S?

Answer 8

Where dna is synthesised and the content of dna doubles - chromosomes separate to chromatids

Question 9

What is G2?

Answer 9

Where more cell growth occurs and organelles divide, chromosomes begin to condense and energy stores are prepared