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What are the four levels of protein structure? Please name and describe each level.

Primary - where amino acids are in the correct order in the polypeptide chain. Secondary - where small structures within the chain begin to form (including alpha helices and beta pleated sheets). Tertiary - ...
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Answered by Leah Y. • Biology tutor
7795 Views

When to use ser and when to use estar?

Ser and etsar are both ways of saying 'to be', but are used in different situations. There is an easy way to remember when to use which verb: SER - DOCTOR Descriptions Occupations Characteristics Time/date O...
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Answered by Eloise E. • Spanish tutor
3970 Views

How is breathing rate regulated by the body to meet the increasing demands of exercise?

The command word is ‘how’ and so the question is asking by what means the body meets the increasing demands of exercise.As we all know, breathing rate increases when the body exercises, and so your answer sh...
JH
17234 Views

Describe and explain the formation of landforms of river rejuvenation.

The command words are ‘describe’ and ‘explain’, so a good answer should address both. The question focuses on landforms of rejuvenation and therefore you should refer to features such as knickpoints, incised...
JH
Answered by Jacob H. • Geography tutor
19817 Views

To what extent was Stalin’s leadership the most significant reason for Soviet victory during the Great and Patriotic War?

The command phrase is ‘To what extent’ and so your answer should make an assessment as to how important Stalin’s role was in relation to other factors. As the question focusses on Stalin’s leadership, around...
JH
Answered by Jacob H. • History tutor
16521 Views