Answer:
The answer is A. Scientists believe it was 500,000 years ago.
Answer:
D
Explanation:
the shape of the enzyme helps determine the chemical reaction it will be a part of
Answer:
C. Charged, polar, or non-polar
Explanation:
Amino side chains, also called R groups, are classified into the categories of charged, polar, and non polar.
These classifications can be determined by the structure and elements within the R group/functional group.
