Figure 3 shows a diagram of a mouse sperm cell - Edexcel - GCSE Biology Combined Science - Question 3 - 2023 - Paper 1
Question 3
Figure 3 shows a diagram of a mouse sperm cell.
(i) Which row of the table shows the functions of structure A and structure B? (1)
(ii) The diploid chromosome numb... show full transcript
Worked Solution & Example Answer:Figure 3 shows a diagram of a mouse sperm cell - Edexcel - GCSE Biology Combined Science - Question 3 - 2023 - Paper 1
Step 1
Which row of the table shows the functions of structure A and structure B?
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Answer
The correct row indicates that structure A releases energy and structure B contains genetic material.
Step 2
State the number of chromosomes in a mouse sperm cell.
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Answer
A mouse sperm cell has 20 chromosomes, as it is haploid.
Step 3
Give one scientific reason why the bone marrow transplant in 1968 was from a sister to her brother.
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Answer
The transplant was from a sister to her brother because they share a greater genetic similarity, reducing the risk of rejection.
Step 4
Give one scientific reason why some people are opposed to the isolation of human embryonic stem cells.
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Some people oppose the isolation due to ethical concerns regarding the potential destruction of embryos.
Step 5
Discuss the benefits of using these stem cells to treat the patient.
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Answer
Using stem cells derived from a patient's own skin cells can reduce the risk of rejection, as they are the patient's own genetic material. This approach also circumvents the ethical concerns associated with embryonic stem cells, and the potential for these cells to regenerate damaged tissues or organs is a significant benefit in regenerative medicine.
