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Introduction:
The RNA (ribonucleic acid) polymerase is a multi-subunit enzyme. It catalyzes the transcription of DNA (deoxyribonucleic acid) into different types of RNA.
Answer to Problem 1TYK
Correct answer:
The bacterial RNA polymerase produces mRNA (messenger RNA) when it transcribes a protein-coding gene.
Explanation of Solution
Explanation/Justification for the correct answer:
Option (c) is given that mRNA is produced by the bacterial RNA polymerase when it transcribes a protein-coding gene. The amino acids (building blocks of protein) are encoded by mRNA. Therefore, the mRNA is formed when the bacterial RNA polymerase transcribes the protein-coding genes. Hence, Option (c) is correct.
Explanation for incorrect answers:
Option (a) is given that rRNA (ribosomal RNA) is produced by the bacterial RNA polymerase when it transcribes a protein-coding gene. The rRNA is found in ribosomes. The rRNA plays a considerable role in the process of protein synthesis and not in the protein coding. So, it is an incorrect option.
Option (b) is given that tRNA (transfer RNA) is produced by the bacterial RNA polymerase when it transcribes a protein-coding gene. The tRNA helps to decode the mRNA sequence into a functional protein. So, it is an incorrect option.
Option (d) is given that snRNA (small nuclear RNA) is produced by the bacterial RNA polymerase when it transcribes a protein-coding gene. The snRNA helps in the splicing process to produce the mature mRNA. So, it is an incorrect option.
Hence, options (a), (b), and (d) are incorrect.
Thus, a bacterial RNA polymerase produces mRNA when it transcribes a protein-coding gene.
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Chapter 17 Solutions
Biological Science (7th Edition)
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- In RNA silencing, siRNAs and miRNAs usually bind to which part of the mRNA molecules that they control? a. 5′ UTR b. Coding region c. 3′ poly(A) tail d. 3′ UTRarrow_forwardWhich gene regulation event is ONLY present in prokaryotes? a. transcription level of regulation b. Capping of precursor mRNA c. Polyadenylation of the 3' end of the mRNAs d. mRNA splicingarrow_forwardWhich enzyme is responsible for the synthesis of pre-mRNA? A. RNA polymerase I B. RNA polymerase II C. RNA polymerase III D. RNA polymerasearrow_forward
- Mutation occurs in which part of the central dogma process? a. replication b. transcription c. transation d. synthesisarrow_forwardWhat process is the P site in a ribosome most closely associated with? a. Binds the tRNA molecule carrying the next needed amino acid to the mRNA strand b. Transcription of DNA to RNA c. Release of a tRNA molecule from a ribosome d. Anchoring of the tRNA holding the growing polypeptidearrow_forwardHow many mRNA nucleotides does it take to code for a polypeptide that is 30 amino acids long? a. 300 b. 90 c. 30 d. 10arrow_forward
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