Cell Cycle

Question 1

Steps of mitosis

Answer 1

Prophase
Metaphase
Anaphase
Telophase

Question 2

Prophase

Answer 2

The breakdown of the nuclear membrane.
DNA condenses by supercoiling.
Centrioles move to poles and spindle fibers form.

Question 3

Cyclins

Answer 3

What binds to protein kinases activating them.

Level in cells is rhythmic.

Question 4

Mitosis

Answer 4

The division of the nuclear membrane

Question 5

Metaphase

Answer 5

Chromosomes line up at the equator and attach to spindle fibers.

Question 6

Anaphase

Answer 6

Spindle fibers contract separating chromatids at centromere.
Chromosomes move to poles.

Question 7

Cytokinesis

Answer 7

The division of the cell membrane.
In animal cells the membrane pinches off and creates a cleavage Furrow.
In plant cells a cell plate lines across the equator.

Question 8

Interphase

Answer 8

The active period. Where cells grow and carry out functions and prepare for division.

Question 9

Mitotic index

Answer 9

The number of cells in mitosis/ The total number of cells.

Question 10

Protein kinases

Answer 10

Activates enzymes that leads cells out of G1 or G2

Question 11

Telophase

Answer 11

Nuclear membranes form.
Chromosomes decondense.
Spindle fibers breakdown

Question 12

Mutagens

Answer 12

Chemicals that can change DNA.
May change structure of important enzymes.
Carcinogen affects control of cell cycle

Question 13

Benign Tumor

Answer 13

Tumor that stays in one place.

Question 14

Malignant tumor

Answer 14

Tumor that spreads

Question 15

Stages of Interphase

Answer 15

G1: growth and work
S: DNA synthesis of each chromosome becomes sister chromatids
G2: centrioles, chloroplasts and mitochondria replicate