Answer:
A
Explanation:
the answer is A because all of this organelles found in every organism
This is something that you have to do yourself but i suggest doing some research ^-^
The R group is what allows amino acids to form macromolecules with different properties. every amino acid has the same basic structure, the only difference is what the R group is made up of. The similarities allow the amino acids to form a chain while the differences allows them to have different functions. Hope this helped!
