Producing New Cells

Question 0

What does cell division do?

Answer 0

Produces new cells for growth and/or repair

Question 1

What is cell division?

Answer 1

Increasing the number of cells in an organism

Question 2

What is the biological term for cell division ?

Answer 2

Mitosis

Question 3

Describe the process of mitosis

Answer 3

1. Uncoiled chromosomes double to form two identical chromatids which are joined together
2. Chromosomes become short and the nucleus membrane disappears
3. Chromosomes line up at the equator of the cell
4. Spindle fibers attach themselves to the cells and pull them apart to the poles of the cell
5. Once at the poles the chromosomes become long again and are surrounded by a nuclear membrane
6. Finally, the cytoplasm divides to form two identical daughter cells

Question 4

How many chromosomes are there after mitosis?

Answer 4

The same amount as before as mitosis maintains the same chromosome complement

Question 5

Why is mitosis important ?

Answer 5

To maintain the chromosomes compliment and so that a cell has a full set of information for growth and development and so it can carry out normal cell functions

Question 6

How can cells be cultured?

Answer 6

Using solids or liquid media that roovide all the nutrients needed for rapid multiplication.

Question 7

What factors must be controlled while culturing cell ?

Answer 7

Food, oxygen and temperature

Question 8

How could optimum conditions for growing cells be achieved?

Answer 8

Automatically in a computer controlled fermenter

Question 9

During cell culturing, how is cell contamination prevented?

Answer 9

By using aseptic techniques such as washing hands before and after the practical, work should be carried out beside an up draught of hot air from a Bunsen and all equipment must be sterilized before and after use.