Question

Choose the correct answers from the alternatives given :
RNA polymerase

• A. can produce several polypeptide chains at one time through the creation of polysomes
• B. starts transcribing at an AUG triplet on one DNA strand
• C. transcribes both introns and exons
• D. transcribes both DNA strands, but always in a $5^{\prime }\to 3^{\prime }$ direction

Answer 1

The correct option is C transcribes both introns and exons

RNA polymerase transcribes both exons and introns present in DNA which are consecutively present in the RNA too, although, introns are removed by splicing in a mature mRNA. Exons are the segment of the genetic material or DNA/RNA that code for an amino acid but introns do not code for any amino acid sequence or protein. Introns have a regulatory function in both replication and transcription processes.

So, the correct option is 'transcribes both introns and exons'.