Question

Which of the following is a function (job) of proteins?

Select all that apply.
A . Proteins act as antibodies to defend the body from harmful substances.
B . Protein act as the main fuel source for cells
C. Proteins build structures such as muscles .
D . Proteins help to speed up chemical reaction in the cell .

Answer 1

I’m pretty sure it’s C. But at the same time it can be A.