alleryStart learning →What terminates transcription of a gene read by RNA polymerase I?
AA hairpin that forms within the transcript
BAn 18-nucleotide sequence read by a protein
CA run of G nucleotides on the template
DA release factor entering the polymerase
Answer & Solution
Correct answer: B. An 18-nucleotide sequence read by a protein
1. Unlike RNA polymerase II, both polymerase I and polymerase III need real termination signals.
2. Genes read by RNA polymerase I carry a specific 18-nucleotide sequence.
3. A termination protein recognizes that sequence and ends transcription.
4. Termination by RNA polymerase III instead uses a hairpin, so the hairpin option names the wrong enzyme.
5. A run of G nucleotides on the template is the prokaryotic rho-dependent signal.
6. Release factors act at nonsense codons during translation, so they play no part in transcription.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 15 "Genes and Proteins", section 15.3 Eukaryotic Transcription_
Keep practising Genes and Proteins
Browse all Genes and Proteins questions for CSIR NET, or explore more Biology topics.
Related questions
How long does the E. coli translation apparatus take to add one amino acid?Tetracycline blocks the A site of a bacterial ribosome. Which step does that stop?What do chaperone molecules do during protein folding?What does a signal sequence do for a newly made protein?What kind of catalyst is peptidyl transferase, and where does it sit?In what order does a charged tRNA pass through the three compartments of the ribosome?Which ribosomal site does the initiator tRNA occupy as the initiation complex forms?In the Kozak consensus around a vertebrate start codon, which bases can occupy the R posit