Cell Cycle and Mitosis

Question 1

Why do cells divide?

Answer 1

1. Cell membrane has to stay efficient 2. DNA overload

Question 2

What is DNA overload

Answer 2

The larger a cell becomes, the more demands it places on its DNA

Question 3

Two main stages of cell division

Answer 3

Mitosis and cytokinesis

Question 4

Genetic information bundled into packages of DNA

Answer 4

Genes

Question 5

Genetic information is passed to offspring through

Answer 5

Chromosomes

Question 6

Chromosomes are made up of

Answer 6

DNA and proteins

Question 7

Chromosomes are visible during

Answer 7

Cell division

Question 8

Where a pair of chromatids are attached

Answer 8

Centromere

Question 9

Examples of why mitosis may occur

Answer 9

If you get a cut, have a tumor, or damage an organ

Question 10

Stores your DNA inside the cell

Answer 10

Nucleus

Question 11

Cells with 46 chromosomes

Answer 11

Diploid

Question 12

Cells that are haploid (Single set of chromosomes)

Answer 12

Sex cells

Question 13

Process that produces haploid cells

Answer 13

Miosis

Question 14

What a cell does during interphase to duplicate

Answer 14

Centrosomes duplicate, DNA replicates

Question 15

During interphase, DNA is loosely coiled and called

Answer 15

Chromatin

Question 16

What happens during prophase

Answer 16

Chromatin condenses to DNA wrapped around proteins.

Question 17

Centrosomes extend thses as they move to opposite ends of a cell

Answer 17

Microtubules

Question 18

What happens in metaphase

Answer 18

Chromosomes attack to microtubules at centromere, chromosomes line up in middle of cell.

Question 19

Who first observed mitosis?

Answer 19

Walter Flemming

Question 20

Why is it called mitosis

Answer 20

“Thread” representing chromatin

Question 21

During anaphase

Answer 21

Chromosomes split and move to ends of cell

Question 22

During telophase

Answer 22

Nuclear membrane reforms, chromosomes back to chromatin

Question 23

Cytokinesis

Answer 23

Little crease forms called cleavage. 2 nuclei move apart and seperate

Question 24

Proteins that regulate the cell cycle

Answer 24

Cyclins

Question 25

Responds to events inside a cell

Answer 25

Internal regulators

Question 26

Responds to events outside a cell

Answer 26

External regulators

Question 27

Stimulate the growth of cells

Answer 27

Growth factors

Question 28

Cancer

Answer 28

Uncontrolled cell growth

Question 29

Masses made by cancer cells

Answer 29

Tumors

Question 30

Tumors attract blood vessle growth and shunt all blood flow to canerous cells

Answer 30

Angiogenesis

Question 31

Benign Tumor

Answer 31

Tumor cells remain at original site

Question 32

Malignant Tumor

Answer 32

Cells break away from the tumor site and begin to spread (metasis)