Cell Cycle

Question 1

G1 stands for

Answer 1

Growth 1

Question 2

S stands for

Answer 2

Synthesis

Question 3

G2 stands for

Answer 3

Growth 2

Question 4

M stands for

Answer 4

Mitosis

Question 5

Order of cell cycle

Answer 5

G1
S
G2
M

Question 6

The longest stage of the cell cycle is the combined period of G1, S, and G2 known as

Answer 6

Interphase

Question 7

What occurs during the G1 stage of the cell cycle?

Answer 7

Cell increases in size, organelles increase in number, proteins are synthesized, cell carries out normal functions

Question 8

What is the function of the S stage in Interphase?

Answer 8

DNA is replicated

Question 9

Why is DNA replication essential before any kind of cell division occurs?

Answer 9

In order for each new cell to get a complete set of the DNA and be genetically identical, the parent cell’s DNA must first be copied, so that those copies can just be separated during division. The maintains the DNA information in all new cells produced by division.

Question 10

Why would a cell enter G0? How is it different from the rest of the Cell Cycle?

Answer 10

G0 is a stage where a cell “exits” the cell cycle and does not divide nor prepare to divide.

Question 11

What would be an example of a cell that uses G0?

Answer 11

Nerve cels

Question 12

What can result from a cell that bypasses the cell cycle checkpoints?

Answer 12

Cancer, which is uncontrolled cell growth, producing tumors, which are masses of cells.

Question 13

What does diploid mean? What is the diploid number for humans?

Answer 13

Diploid = two sets of chromosomes (2n)
Human 2n = 46

Question 14

Select the incorrect association.
G1 - cell grows in size
G2 - preparation for division
M - nuclear division
S - DNA is broken down to its monomers

Answer 14

S

Question 15

The cell cycle
Includes mitosis as an event.
Includes only the stages of G1, S, and G2.
Is uncontrolled and unregulated.
Involves proteins but not chromosomes.

Answer 15

Mitosis