B2 Cell Division

Question 1

What are the 3 stages of cell division

Answer 1

Interphase, Mitosis, Cytokinesis

Question 2

Why is mitotic cell division important?

Answer 2

Growth, repair and development of multicellular organisms

Question 3

What happens in the interphase

Answer 3

Before a cell can divide it needs to grow and increase the number of sub-cellular structures such as ribosomes and mitochondria. The DNA replicates to form two copies of each chromosome.

Question 4

What happens in mitosis

Answer 4

In mitosis one set of chromosomes is pulled to each end of the cell and the nucleus divides.

Question 5

What happens in cytokinesis

Answer 5

Finally the cytoplasm and cell membranes divide to form two identical cells.

Question 6

What is a stem cell

Answer 6

A stem cell is an undifferentiated cell of an organism which can produce lots more undifferentiated cells. They can differentiate into different types of cells depending on what instructions they’re given

Question 7

Stem cells from human embryos can

Answer 7

Be cloned and made to differentiate into most different tupes of human cells.

Question 8

Stem cells from adult bone marrow can

Answer 8

Form many types of cells including blood cells

Question 9

Meristem tissue in plants can

Answer 9

Differentiate into any type of plant cell, throughout the life of the plant

Question 10

What diseases can stem cells cure

Answer 10

Diabetes and paralysis

Question 11

Potential risks of stem cells

Answer 11

transfer of viral infection, and some people have ethical or religious objections.