Cell Cycle

Question 1

What is the cell cycle

Answer 1

Repeating sequence of cellular growth and division during an organism’s life

Question 2

The longest phase of the cell cyckle

Answer 2

Interphase

Question 3

What phases of the cell cycle are known as interphase

Answer 3

First growth
Synthesis
Second growth

Question 4

What happens in G1

Answer 4

Cell doubles in size

Enzyme and organelle numbers double

Question 5

What happens to cells that don’t divide

Answer 5

They stay in interphase or move to G0

Question 6

What are the five phases of the cell growth

Answer 6

• first growth
• synthesis
• second growth
• mitosis
• cytokinesis

Question 7

Cells don’t ___ nonstop

Answer 7

Replicate

Question 8

Example of cells that sty in G0 or G1 are

Answer 8

Muscle cells and nerve cells

Question 9

What happens in G2

Answer 9

• centrioles duplicate, microtubules are made, cell continues to grow
• final preparations are made

Question 10

What phase is when the chromatin, which is made of DNA , replicates

Answer 10

S phase

Question 11

During cytokinesis animal cells form a protein belt that establishes a

Answer 11

Cleavage furrow

Question 12

What begins to break down during prophase

Answer 12

Nuclear membrane

Nucleolus

Question 13

In multicellular organisms, many cells remain in

Answer 13

Interphase

Question 14

What are “checkpoints”

Answer 14

Things that trigger or delay phases

Question 15

What are the steps of mitosis

Answer 15

Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

Question 16

What is the most important checkpoint

Answer 16

G1

Question 17

What happens in the G1 checkpoint

Answer 17

It decides if the cell will divide

Question 18

What forms during prophase

Answer 18

Chromosomes

Question 19

What happens at the mitosis checkpoint

Answer 19

Signals end of mitosis and the start of G1 phase

Question 20

What phase is where cells spend most of their lives

Answer 20

First growth

Question 21

During telophase chromatids untie and return to

Answer 21

Chromatin

Question 22

Where do centrioles go during metaphase

Answer 22

The opposite ends of the cells

Question 23

Where do fibers pull the chromosomes during metaphase

Answer 23

The equator of the cell

Question 24

Where are chromosomes lined up on during metaphase

Answer 24

The metaphase plate

Question 25

What are spindle fibers

Answer 25

Strands of protein

Question 26

During anaphase the spindle fibers pull each chromatid strand toward the ___ at the ___ ___ of the cell

Answer 26

Centrioles

Opposite ends

Question 27

The end results of mitosis
___ new cells
___ in size than the original
___ number of chromosomes

Answer 27

Two
Smaller
Same

Question 28

In prophase two types of spindle fibers connect to the ___ and the ___

Answer 28

Chromosomes and centrioles

Question 29

Dyeing telophase the spindle fibers/centrioles

Answer 29

Disappear

Question 30

During telophase each end if the cell has a complete set of

Answer 30

Chromosomes

Question 31

During prophase the centrioles develop and move away from each other in what type of cells

Answer 31

Animal cells

Question 32

During cytokinesis each newly formed cell gets a

Answer 32

Nucleus

Question 33

During telophase the nuclear membrane begins to

Answer 33

Form

Question 34

During cytokinesis plant cells create a ___ ___ that becomes the new cell wall

Answer 34

Cell plate

Question 35

During cytokinesis what is divided between the two new daughter cells

Answer 35

Cytoplasm

Question 36

During anaphase the sister chromatids are

Answer 36

Pulled apart at the centromeres by the fibers

Question 37

The nucleolus ___ during telophase

Answer 37

Reforms

Question 38

What happens in the G2 checkpoint

Answer 38

Allows for the checking of DNA and proceeds to mitosis

Question 39

What are checkpoints controlled by

Answer 39

Enzymes