Unit #2 Cell Cycle and Mitosis

Question 1

Cyclins

Answer 1

Regulate the cell cycle.

Question 2

Internal regulators

Answer 2

Type of cyclins that respond to events inside of the cell.

Question 3

Tumors

Answer 3

When cells divide uncontrollably, masses of cells become tumors.

Question 4

External regulators

Answer 4

Type of cyclins that respond to events outside of the cell. Directs cells to speed up or slow down the cell cycle.

Question 5

Angiogenesis

Answer 5

Blood vessel growth that tumors attract to surrounding tissues.

Question 6

Benign

Answer 6

Tumor cells remain at original site. Can be removed and considered not cancerous.

Question 7

Malignant

Answer 7

Cells break away from tumor site and begin to spread (metastasis) through the blood stream.

Question 8

Chromatin

Answer 8

DNA is loose, relaxed, and unwound

Question 9

Chromosome

Answer 9

Tightly wound, organized, seen in cell division, considered super coiled chromatin.

Question 10

G1 phase

Answer 10

Cells do most of their growing during this time.

Question 11

S Phase

Answer 11

DNA replicates so their is twice as much DNA as before.

Question 12

G2 phase

Answer 12

Cell prepares for division by gathering the organelles and molecules needed.

Question 13

Interphase

Answer 13

Cell spends mose of its time in this stage (90%).

Question 14

Why do cells divide?

Answer 14

Cells can grow by increasing in size, but eventually, most cells divide after growing to a certain point.

Question 15

Cell division

Answer 15

Process where the cell divides into two new “daughter cells.”