2.2 - Cell division

Question 1

When does DNA replication occur during the cell cycle?

Answer 1

During interphase

Question 2

Describe the cells that mitosis produces

Answer 2

Two genetically identical daughter cells, each with identical copies of DNA

Question 3

Describe interphase in mitosis

Answer 3

Cell growth and DNA replication

Question 4

Describe prophase in mitosis

Answer 4

Chromosomes condense so are visible

Question 5

Describe metaphase in mitosis

Answer 5

Chromosomes line up down equator of cell
Spindle fibres attach to centromeres of chromosomes

Question 6

Describe anaphase in mitosis

Answer 6

Chromatids pulled to opposite poles of cell by spindle fibres

Question 7

Describe telophase in mitosis

Answer 7

Chromosomes become longer and thinner
Cytokinesis

Question 8

What is cytokinesis?

Answer 8

Division of cytoplasm which produces two new cells

Question 9

Why do cancer treatments aim to control the rate of cell division?

Answer 9

Cancer is rapid, uncontrollable cell division

Question 10

Describe the process of binary fission in bacteria

Answer 10

Replication of circular DNA and plasmids
Division of cytoplasm to produce two daughter cells, each with a single copy of the circular DNA and variable number of plasmid copies

Question 11

Do viruses undergo cell division and why?

Answer 11

No because they are acellular (non-living). They inject their nucleic acid into the host cell which replicates the viral particles.