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?
| function of structure A ... 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 answer is Row D: Structure A releases energy and Structure B contains the genetic material.
Step 2
State the number of chromosomes in a mouse sperm cell.
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Answer
A mouse sperm cell contains half of the diploid chromosome number, which is 20 chromosomes (since the diploid number is 40).
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 bone marrow transplant was likely performed from a sister to her brother because of the high probability of genetic compatibility, reducing the risk of rejection of the transplanted cells.
Step 4
Give one scientific reason why some people are opposed to the isolation of human embryonic stem cells.
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Answer
Some people oppose the isolation of human embryonic stem cells because it involves the destruction of embryos, which raises ethical concerns regarding the onset of human life.
Step 5
Discuss the benefits of using these stem cells to treat the patient.
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Answer
Using a patient's own skin cells to generate stem cells has several benefits:
Reduced Rejection Risk: Since the stem cells are derived from the patient's own tissue, there is a significantly lower risk of immune rejection compared to using cells from another individual.
Ethical Considerations: This approach circumvents ethical issues associated with harvesting embryonic stem cells, making it a more socially acceptable option for treatment.
Versatility in Treatment: These induced pluripotent stem cells (iPSCs) can differentiate into various cell types, offering potential treatments for a wide range of medical conditions, including neurodegenerative diseases or tissue damage.
