3.2.2 Cell Cycle

Question 1

All stages of mitosis

Answer 1

1. Prophase ( longest)
   Nuclear envelope disintegrate a nucleolus disappeared.
   * Chromosome condense, shorten, and they can become visible
   Centrioles move to opposite ends of the cell
   Spindle fibre start to develop
2. Metaphase.
   Chromosome attached to spindle fibre by the centromere
   They line up at right angle along the equator of the cell?
3. Anaphase (fast)
   * Centromere is divided into two (splitting)
   Spindle fibre, shortened , and * pull chromatids to opposite poles of the spindle
4. Telophase.
   Chromatids have reached the pose and are referred to chromosome again
   Chromosomes weekend to lengthen and coiled and loose visibility
   Spindle fibre disintegrate
   Nuclear envelope reforms and nucleolus reappears
   Nuclear division is complete all

Question 2

control process of mitosis

Answer 2

Mitosis is a gene controlled process

Question 3

How do you treat cancer? What’s the problem behind that?

Answer 3

Involve killing rapidly, dividing sale by blocking a part of the cell cycle
1. Prevent DNA replication.
2. Inhibiting metaphase by interfering with spindle fibre formation.

Problem: interfere with normal cell cycle that Need rapid devision

Question 4

Why did drug for cancer is not give more frequently?

Answer 4

If the frequency was increased, the health of the body cell would not have time to increase the number to near normal again between treatment. The number with decline rapidly after a few treatment and possibly will kill the patient.

Question 5

Why the cancer drug is not increasing dozed

Answer 5

The increase those with you, even more healthy cells each time, and again, their number will decline to rapidly after the treatment and possibly kill the patient

Question 6

Cell division of prokaryotic cell

Answer 6

Binary fission

Question 7

Explain stage of binary fission

Answer 7

Grow
2. Replication of (circular) DNA;
3. Division of cytoplasm to produce 2 daughter cells; (Grow new cell wall )
4. Each with single copy of (circular) DNA;

Question 8

Best environment for binary fission

Answer 8

Warm
Moist
Plenty of nutrient

Question 9

The usage of Log

Answer 9

Make it easy to accurately, read the graph data
For a large range of data

Question 10

why taking cell from the root tip
frimly squashing the root tip
in experiment of observing mitosis

Answer 10

mitotsis happen at root tip
thine ough for light to pass through

Question 11

mitotic index

Answer 11

number of cell in mitois state / total cell in sample

Question 12

why cant you give patient a placebo in cancer experiment

Answer 12

not ethical fail treating cancer