Question

Find out the correct choices with respect to the functions of different types of RNA?
I. Directs the assembly of proteins on ribosomes.
II. Delivers amino acids to ribosomes.
III. Links amino acids together to form proteins.

• A. I. mRNA; II. rRNA; III. tRNA
• B. I. mRNA; II. tRNA; III. rRNA
• C. I. rRNA; II. mRNA; III. tRNA
• D. I. tRNA; II. mRNA; III. rRNA
• E. I. tRNA; II. rRNA; III. mRNA

Answer 1

Answer: (B)

I. mRNA; II. tRNA; III. rRNA

Messenger RNAs (mRNAs) specify the amino acid sequence of one or more polypeptides, thus direct protein assembly on ribosomes (I). Transfer RNAs (tRNAs) read the genetic information present in the form of triplets in the mRNA and transfer the appropriate amino acid from amino acid pool of cytoplasm to a growing polypeptide chain during protein synthesis (II). Ribosomal RNAs (rRNAs) are structural constituents of ribosomes that provide the site for proteins synthesis which makes them the most abundant form of RNA (III).

Therefore, the correct answer is option B.