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 | function... 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 is:
function of structure A
function of structure B
B
contains digestive enzymes
A
contains the genetic material
Step 2
State the number of chromosomes in a mouse sperm cell.
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Answer
The number of chromosomes in a mouse sperm cell is 20, as sperm cells are haploid, containing half the diploid number of 40 chromosomes.
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
One scientific reason is that a sibling is likely to have a more compatible tissue type, which can reduce the risk of rejection during the transplant.
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 are opposed because the process of isolating embryonic stem cells typically involves destroying the embryo, which raises ethical concerns regarding the status of the embryo.
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 has several benefits:
Reduced Rejection Risk: Since the cells are autologous (from the same individual), they are less likely to be rejected by the patient’s immune system.
Versatility: These stem cells can differentiate into various cell types, providing potential treatments for a wide range of conditions.
Ethical Acceptance: Using skin cells circumvents ethical issues associated with embryonic stem cells, as no embryos are harmed or destroyed in the process.
