The disease sickle cell anaemia is marked by the presence of an abnormal protein in the blood of people with this disease - VCE - SSCE Chemistry - Question 5 - 2008 - Paper 1
Question 5
The disease sickle cell anaemia is marked by the presence of an abnormal protein in the blood of people with this disease. The sixth position in the normal protein c... show full transcript
Worked Solution & Example Answer:The disease sickle cell anaemia is marked by the presence of an abnormal protein in the blood of people with this disease - VCE - SSCE Chemistry - Question 5 - 2008 - Paper 1
Step 1
A. Sickle cell protein chain has the greater molecular mass.
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Answer
This option is incorrect because while the sickle cell protein chain differs in just one amino acid, glutamic acid has a greater molecular mass compared to valine.
Step 2
B. Sickle cell protein chain has the greater molecular mass.
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Answer
This option is repetitive of the first and is incorrect for the same reason.
Step 3
C. Normal protein chain has the greater molecular mass.
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Answer
This option is correct. The normal protein chain contains glutamic acid instead of valine, giving it a higher molecular mass.
Step 4
D. Normal protein has the greater molecular mass.
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Answer
This option is correct. The normal protein, which consists of glutamic acid, has a greater molecular mass than the sickle cell protein, which has valine.
