The structural RNA of ribosomes is a

A) pre-mRNA.
B) proenzyme.
C) gene.
D) ribosomal RNA (rRNA) .
E) codon.

Ribosomal RNA

A molecular component of ribosomes, essential for protein synthesis in all living organisms, playing a catalytic and structural role in ribosomes.

Structural RNA

RNA molecules that are not translated into protein but form an integral part of cellular structures like ribosomes.

Ribosomes

Cellular organelles that serve as the site of protein synthesis, reading mRNA and linking amino acids together.