Cell Division (Edexcel GCSE Biology)
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Define the term mitosis.
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Define the term mitosis.
Mitosis is a form of nuclear division that results in the production of genetically identical cells. It is part of the cell cycle.
True or False?
Mitosis is another name for the cell cycle.
False.
Mitosis is a part of the cell cycle. The majority of the cell cycle is spent in interphase.
What are the main stages of the cell cycle?
The stages of the cell cycle are:
interphase
mitosis
cytokinesis
What are the stages of mitosis?
The stages of mitosis are:
prophase
metaphase
anaphase
telophase
During prophase of mitosis the condense and become visible and the breaks down.
During prophase of mitosis the chromosomes condense and become visible and the nuclear membrane breaks down.
Which stages of the cell cycle or mitosis are taking place in cells A-C?
The stages shown in cells A-C are:
A = metaphase: the chromosomes are lined up down the cell equator
B = anaphase: spindle fibres are pulling chromatids apart
C = interphase: the chromosomes have not condensed and nuclear membrane is present
During which stage of mitosis do new nuclear membranes form around the chromosomes?
New nuclear membranes form around the chromosomes during telophase.
Why is mitosis important in the body?
Mitosis is important in the body to produce new cells for:
growth
repair of damaged tissues and the replacement of cells
asexual reproduction
True or False?
Mitosis results in genetically diverse cells.
False.
Mitosis results in genetically identical cells.
Describe the outcome of a mitotic division.
A mitotic division produces:
two daughter cells
genetically identical cells
diploid cells
What is cancer?
Cancer is a disease that results from uncontrolled cell division.
True or False?
Cancer occurs due to changes in cells.
True.
Changes inside cells can lead to uncontrolled cell division, causing cancer to develop.