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Biology paper 1
CELL BIOLOGY
Cell division by Mitosis
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Created by
Laaibah Riaz
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Cards (26)
By the end of the video, what should you be able to describe?
The importance and
stages
of
mitosis
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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 of each chromosome do body cells contain?
Two
of each chromosome
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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 in terms of chromosomes?
They have
unpaired
chromosomes
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What do chromosomes carry that determines 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?
Cells must be able to
divide
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What are the two ways cells can divide?
Mitosis
or
meiosis
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What is the focus of this video regarding cell division?
Mitosis
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How many main stages are in the cell cycle including mitosis?
Three
main stages
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What happens in the first stage of the cell cycle?
DNA replicates
to form two copies
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What happens to the cell during the first stage of the cell cycle?
The cell grows and copies
internal structures
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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 of the
cell
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What divides during 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 pairs of chromosomes do the resulting cells have?
Two
pairs of chromosomes
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What might you see in certain textbooks regarding mitosis?
Different
stages
of mitosis
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What is the first function of mitosis mentioned?
Essential for
growth
and development
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What is the second function of mitosis mentioned?
Repairs
damaged tissues
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What is the third function of mitosis mentioned?
Occurs during
asexual reproduction
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What are the stages of the cell cycle involving mitosis?
DNA replication
Mitosis
Cytokinesis
(division of
cytoplasm
and
membrane
)
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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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