Question

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.

tRNA is attached to specific proteins in the cell’s cytoplasm.
tRNA is attached to specific proteins in the cell’s cytoplasm.

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

Amino acids form a polypeptide chain via carbon-carbon bonds.

Answer 1

The true statement is:

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

This statement is correct because there are 20 standard amino acids that are used to synthesize proteins in the human body. The other statements are incorrect for the following reasons:

• tRNA is attached to specific proteins in the cell’s cytoplasm.: tRNA carries amino acids to the ribosome, where proteins are synthesized, but it does not directly attach to proteins.

• Amino acids do not need to be assembled in a particular order.: This statement is false because the specific sequence of amino acids is critical to the structure and function of the protein.

• Amino acids form a polypeptide chain via carbon-carbon bonds.: Polypeptide chains are formed through peptide bonds, which are a specific type of chemical bond between the carboxyl group of one amino acid and the amino group of another, not just carbon-carbon bonds.