Question

The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different
A.) Side chains (R groups)
B.) Alpha (a) carbons
C.) asymmetric carbons
D.) amino groups attached to an alpha (a) carbon
E.) carboxyl groups attached to an alpha (a) carbon

Answer 1

I believe it's A

Answer 2

Amino acids exhibit different chemical and physical properties because of their R groups.

An amino acid is asymmetric, meaning that it is a carbon bound to 4 different elements.


Three out of the four are the same in every amino acid.


These three are: an amino group, a Hydrogen, and a carboxyl group (otherwise known as an acid) Hence the name Amino Acid.


The 4th grouping is called the R group, and it is different for every amino acid.


This R group determines the shape of the amino acids and the shape determines function.

Answer 3

Thank you