The cell cycle 5

Question 1

What is the interphase.

Answer 1

growth and development of cell. prepares for reproduction DNA synthesis etc.

Question 2

what is the mitotic phase

Answer 2

division of nucleus and cell.

Question 3

how many phases is the mitotic phase

Answer 3

four phases

Question 4

what is cytokinesis

Answer 4

division of cell

Question 5

Explain the 4 steps of prophase/prometaphase

Answer 5

centrioles move to opposite ends.

nuclear envelope disappears.

chromosomes appear with centromeres.

chromosomes move to spindles.

Question 6

explain metaphase

Answer 6

chromosomes lined up in centre in what’s called a metaphase plate.

Question 7

explain anaphase

Answer 7

sister chromosomes split and move to opposite ends of spindle.

Question 8

explain telophase

Answer 8

nuclear envelopes reappear, cytokinesis is completed.

Question 9

explain telophase further

Answer 9

cell continues to elongate as free spindle fibres from each centrosome push off each other.

2 nuclei begin to form.

chromatin becomes less tightly coiled.

cytokinesis, division of the cytoplasm begins.

Question 10

what factors contribute to aging in cells.

Answer 10

protein cross-links by glucose or diabetes.

free radical damage - antioxidants.

cessation of mitosis - hayflick limit

Question 11

what are the phases in cell cycle

Answer 11

prophase/prometaphase,
metaphase, anaphase, telephone