Question

Which of the following statements regarding amino acids is false?

a. there are 20 different types of amino acids used by cells
b. amino acids can be linked together by peptide bonds, which join the carboxyl group of one amino acid to the amino group of a second amino acid
c. amino acids differ from eachother by the behavior of their R-groups
d. amino acids with two or more R-groups allow protein to take on unique structures and therefore unique functions.
e. the R-groups of the amino acids is what gives them their unique properties.

Answer 1

Amino acids are the building blocks of proteins and each amino acid has a unique R group. This means that statement c is false.

Step-by-step explanation:

Amino acids are the building blocks of proteins. Each amino acid has a central carbon atom bonded to an amino group, a carboxyl group, a hydrogen atom, and a variable R group. The R group is what gives each amino acid its unique properties. Therefore, statement c is false as amino acids differ from each other by the behavior of their R groups. The other statements are true, including the fact that there are 20 different types of amino acids, amino acids can be linked together by peptide bonds, and amino acids with two or more R groups allow proteins to take on unique structures and functions.