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biology paper 1
topic 1 - cell biology
cell division by mitosis
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Cards (24)
What do both plant and animal cells contain?
A
nucleus
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What are chromosomes made of?
The molecule
DNA
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How many chromosomes does the cell contain in the video?
Four
chromosomes
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How many pairs of chromosomes do human body cells contain?
23
pairs of chromosomes
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What are gametes?
Cells with unpaired
chromosomes
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What do chromosomes carry that determines many features?
A large number of
genes
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How many genes do the chromosomes in the video have?
Four
genes
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What is the purpose of the cell cycle?
To allow cells to
divide
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What are the two ways cells can divide?
Mitosis
and
meiosis
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What is the first stage of the cell cycle?
DNA replicates
to form copies
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What happens to the chromosomes during the first stage of the cell cycle?
They remain attached after
replication
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What internal structures does the cell copy during the first stage?
Mitochondria
and
ribosomes
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What occurs in the second stage of the cell cycle?
Mitosis
takes place
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What happens to the chromosomes during mitosis?
One
set
is
pulled
to
each
end
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What divides in the final stage of the cell cycle?
The
cytoplasm
and
cell membrane
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What is the result of the cell cycle?
Two
identical
cells are formed
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How many stages of mitosis do AQ exams require you to know?
The
stages
shown
in
the
video
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What is one function of mitosis?
Essential for
growth
and development
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When does mitosis take place in an organism?
When it
repairs
itself
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What is another function of mitosis?
Occurs during
asexual reproduction
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What are the stages of the cell cycle involving mitosis?
DNA replication
Mitosis
Cytoplasm and membrane division
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What are the functions of mitosis?
Essential for
growth
and
development
Repairs
damaged
tissues
Occurs during
asexual
reproduction
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Where can you find questions on the cell cycle and mitosis?
In the
revision workbook
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What should you be able to do after watching the video?
Describe the importance and
stages
of
mitosis
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