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MayFlowers
27.09.2021 •
Biology
[3]
(ii) Name the type of polypeptide in a haemoglobin molecule that is different in sickle cell
haemoglobin
[1]
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Ответ:
Sickle hemoglobin differs from normal hemoglobin by a single amino acid of the valine replaces glutamate at position 6 on the surface of the beta chain
Ответ:
2 alpha chains ( each chain consist of 141 AA)
2 beta chains( each beta chain consist of 146 AA)
In haemoglobin these four chains of protein are arranged in quaternary manner.
Normal haemoglobin Beta chain consist of; valine— Histadine—leucine— Threonine— proline— glutamic acid—- glutamic acid.
Now in sickle cell anemia the valine amino acid replaces the glutamic acid at possition number 6. Due to which the normal shape of RBC( disc like) is converted into sickle shape. The sickle shape RBC can’t carry oxygen and hence can leads to death.
Ответ:
The frequency of the sound.Hope this helps btw
Explanation:
You would need to know how fast the sound waves go through the air.