Which statement best shows how primary structure relates to protein function?
a)the shape and chemistry of an enzyme's active site determine its function.
b)high temperatures cause proteins to denature.
c)proteins are sensitive to changes in ph .
d)changing one amino acid in the protein hemoglobin causes sickle-cell anemia.

changing one amino acid in the protein hemoglobin causes sickle-cell anemia

Explanation:

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Both countries have a wealth of natural resources and a diverse climate. Both Russia and the United States are difficult to avoid in political alliances because of their size, which, along with their military might, makes them difficult to ignore. It is no surprise that both countries are central states of their regional alliances and will remain so for several years, despite challenges.

Explanation:

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