Question

Which statement is true? (1 point)
Responses

The human body uses 20 amino acids to form all types of proteins.
The human body uses 20 amino acids to form all types of proteins.

Amino acids form a polypeptide chain using carbon bonds.
Amino acids form a polypeptide chain using carbon bonds.

​​​​​​Amino acids do not need to be assembled in a particular order.
​​​​​​ Amino acids do not need to be assembled in a particular order.

Answer 1

The true statement is: "The human body uses 20 amino acids to form all types of proteins."

Brief explanations:
- Proteins are built from a standard set of 20 amino acids (with a few exceptions like selenocysteine).
- Amino acids are joined by peptide (amide) bonds between the carboxyl carbon of one and the amino nitrogen of the next — not simply "carbon bonds."
- The sequence/order of amino acids is crucial for a protein's structure and function.