The diagram represents the cell cycle - Leaving Cert Biology - Question 2 - 2008
Question 2
The diagram represents the cell cycle.
(a) What stage of the cycle is represented by X?
(b) Give the names of the two processes involving DNA which take place dur... show full transcript
Worked Solution & Example Answer:The diagram represents the cell cycle - Leaving Cert Biology - Question 2 - 2008
Step 1
What stage of the cycle is represented by X?
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Answer
The stage of the cycle represented by X is the Interphase.
Step 2
Give the names of the two processes involving DNA which take place during stage X.
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Answer
Uncoiling of DNA
Replication or duplication of DNA.
Step 3
For convenience of study, mitosis is divided into four stages. List these in order starting at A.
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Answer
Prophase
Metaphase
Anaphase
Telophase
Step 4
In which of the stages of mitosis that you have listed in (c) would you expect to see the spindle fibres contracting?
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Answer
The spindle fibres would be contracting during Anaphase (the 3rd stage).
Step 5
Explain the term diploid number.
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Answer
The diploid number refers to the total number of chromosomes in a somatic cell, which are organized in pairs. It represents two sets of chromosomes, one inherited from each parent.
Step 6
What term is used to describe a group of disorders of the body in which cells lose the normal regulation of mitosis?
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The term used to describe this group of disorders is Cancer or a named group of cancers or tumours.
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