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CELL CYCLE AND. CANCER. - Cell Division. Mitosis. During mitosis, the cell’s nucleus divides into two new nuclei. One copy of the DNA is distributed into each of the two daughter cells. - Cell Division. The Cell Cycle. - Cell Division. Length of the Cell Cycle.

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### CELL CYCLEAND

CANCER

Mitosis

- During mitosis, the cell’s nucleus divides into two new nuclei. One copy of the DNA is distributed into each of the two daughter cells.

The Cell Cycle

Length of the Cell Cycle

How long does it take for a cell to go through one cell cycle? It all depends on the cell. A human liver cell, for example, completes one cell cycle in about 22 hours, as shown in the graph. Study the graph and then answer the following questions.

The longest curved arrow represents the cell’s interphase; the shortest represents cytokinesis; and the middle one represents mitosis.

Reading Graphs:

What do the three curved arrows outside the circle represent?

- Cell Division

Length of the Cell CycleInterphase the shortest represents cytokinesis; and the middle one represents mitosis.

Reading Graphs:

In what stage of the cell cycle is the wedge representing growth?

- Cell Division

Length of the Cell Cycle- Cell Division the shortest represents cytokinesis; and the middle one represents mitosis.

10 hours

Interpreting Data:

In human liver cells, how long does it take DNA replication to occur?

Length of the Cell CycleInterphase the shortest represents cytokinesis; and the middle one represents mitosis.

Drawing Conclusions:

In human liver cells, what stage in the cell cycle takes the longest time?

- Cell Division

Length of the Cell Cycle- Cell Division the shortest represents cytokinesis; and the middle one represents mitosis.

Structure of DNA- The DNA molecule is shaped like a twisted ladder.
- How do the Nitrogen bases pair up?
- Adenine – Thymine
- Cytosine - Guanine

- Cell Division the shortest represents cytokinesis; and the middle one represents mitosis.

Replication of DNA- What is it?
- When DNA make exact copy of itself
- Do the nitrogen bases have to match up?
- YES!!
- How?
- Adenine – Thymine
- Cytosine - Guanine

- Cell Division the shortest represents cytokinesis; and the middle one represents mitosis.

The Cell Cycle

SequencingCan you name the stages and phases of Cell Cycle?Interphase

Cell grows, makes a copy of DNA.

Mitosis: Prophase

Cytokinesis

Chromosomes and spindle fibers form; nuclear envelope breaks down.

Cell pinches in two; each daughter cell has same number of identical chromosomes.

Chromosomes line up across the center and attach to a spindle fiber.

Chromosomes stretch out; new nuclear envelope forms around chromosomes.

Mitosis: Anaphase

Mitosis: Telophase

Centromeres split; chromatids separate and move to opposite ends.

Mitosis: Metaphase

What Is Cancer? the shortest represents cytokinesis; and the middle one represents mitosis.

- Let’s find out
- You will work in groups of 3
- Each group member will learn and then teach specific information about Cancer
to the other team mates!

- 1st member will teach: WHAT IS CANCER
- 2nd member: TREATING CANCER
- 3rd member: CANCER PREVENTION
- Each member will take notes
- Finally everyone will have to answer 3 specific questions – we will review them!!

- Cancer the shortest represents cytokinesis; and the middle one represents mitosis.

What Is Cancer?
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