Which statement is true?

Question

(1 point)
Responses

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

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 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.

Here's a brief explanation of why the other statements are false:

• tRNA is attached to specific proteins in the cell’s cytoplasm.: tRNA (transfer RNA) is not attached to proteins; rather, it carries specific amino acids to the ribosome during protein synthesis.

• Amino acids do not need to be assembled in a particular order.: This is false because the sequence of amino acids in a protein (polypeptide chain) is critical for its structure and function.

• Amino acids form a polypeptide chain via carbon-carbon bonds.: Amino acids form peptide bonds (which involve a carbon and nitrogen atom) between the carboxyl group of one amino acid and the amino group of another, rather than directly via carbon-carbon bonds.