Mitotic Cell cycle

Question 1

What are the 3 main phases of the cell cycle?

Answer 1

-interphase
-mitosis
-cytokinesis

Question 2

What are the 3 phases of interphase?

Answer 2

-G1
-S
-G2

Question 3

What occurs during the G1 phase?

Answer 3

-the cell increases in size
- during G1 the cell makes the RNA, enzymes and other proteins required for growth

Question 4

What occurs during the G2 phase

Answer 4

-During G2 the cell continues to grow and the new DNA is checked and any errors are usually repaired

Question 5

What occurs during the S phase?

Answer 5

-During the S phase DNA is replicated to produce chromatids

Question 6

What are telomeres?

Answer 6

short section of non-coding DNA at the ends of chromosomes

Question 7

What is the role of telomeres

Answer 7

Telomeres work by making each chromosomes longer so that part of the telomeres are lost after every cell division rather than coding DNA

Question 8

What are the tree main functions of telomeres

Answer 8

-They prevent the loss of genes during cell division.
-They allow continued cell division.
-They prevent the shortening of chromosomes.

Question 9

What is the importance of mitosis? (what is it used for)

Answer 9

1. Growth of unicellular organisms
   2.Replacement of dead cells and repairmen of damaged cells
2. Asexual reproduction
   4.Production of stem cells

Question 10

What are the stages of mitosis?

Answer 10

-Prophase
-Metaphase
-Anaphase
-Telophase

Question 11

What happens during prophase?>

Answer 11

-the chromosomes condense
-the nuclear envelope breaks down/disappears

-centrioles migrate to opposite poles of the cell forming spindle fibres