Question

Which of the following statements are correct?
I. rRNA provides the template for synthesis of proteins.
II. tRNA brings amino acids and reads the genetic code.
III. RNA polymerase associates with the sigma factor to initiate transcription.
IV. A segment of DNA coding for polypeptide is called intron.

• A. I and III
• B. I and II
• C. I, II and III
• D. II and III

Answer 1

The correct option is D II and III

Messenger RNA (mRNA) contain information which is copied from one of the strands of DNA by the process of transcription and provides the template for protein synthesis, not the rRNA.

tRNA brings in the amino acids from the cytoplasm to the ribosomes for protein synthesis.

The segment of DNA that codes for a polypeptide is called exon while the non coding segment of DNA is called an intron.

RNA polymerase is only capable of catalysing the elongation process. Therefore, in order to initiate the process of transcription, it associates with initiation factor called sigma factor.