Mara Bessinger - Unit #2: The Cell Cycle and Mitosis

Question 1

What are the two reasons why cells have to divide?

Answer 1

DNA overload
The cell has more trouble moving items across the cell membrane

Question 2

Define DNA overload

Answer 2

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

Question 3

Explain what happens to the surface and volume ratio as a cell enlarges.

Answer 3

It decreases

Question 4

Cell division occurs in two main stages. What are they?

Answer 4

Mitosis and interphase

Question 5

What is the cell cycle?

Answer 5

Series of events that take place as the cell grows and divides.

Question 6

Name the stages of the cell cycle in order.

Answer 6

G1, S, G2, m phase

Question 7

What happens in the G1 phase?

Answer 7

Cells grow and new organelles are produced

Question 8

What happens in the S phase?

Answer 8

DNA replicates and chromosomes are copied

Question 9

What happens in the G2 phase?

Answer 9

Organelles and molecules required for cell division are produced

Question 10

What are the 4 stages of mitosis in order?

Answer 10

Prophase
metaphase
anaphase
telophase

Question 11

What is the G0 stage?

Answer 11

stage where cells never divide. (ex. Neurons, red blood, cardiac, sperm, egg))

Question 12

What phases does interphase include?

Answer 12

G1, S, G2

Question 13

What happens in prophase

Answer 13

nuclear envelope disappears, the first visible sign of cell division as well as the longest phase of mitosis.

Question 14

What happens in metaphase?

Answer 14

shortest phase, chromosomes line up in the middle of the cell.

Question 15

What happens in anaphase?

Answer 15

chromosomes pull apart and spindle fibers shorten

Question 16

What happens in telophase?

Answer 16

final phase, cell separates into two identical daughter cells