Multiple Choice
Which of the following processes occurs during transcription?
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15. Gene Expression
Introduction to Transcription
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Which of the following statements about the function of RNA polymerase is correct?
A
RNA polymerase synthesizes DNA during transcription.
B
RNA polymerase requires a primer to initiate RNA synthesis.
C
RNA polymerase synthesizes RNA by adding nucleotides to the 3' end of the growing RNA strand.
D
RNA polymerase is responsible for splicing introns from pre-mRNA.
Verified step by step guidance1
Understand the role of RNA polymerase: RNA polymerase is an enzyme responsible for synthesizing RNA from a DNA template during the process of transcription.
Identify the correct function of RNA polymerase: RNA polymerase synthesizes RNA by adding ribonucleotides to the 3' end of the growing RNA strand. This is a key aspect of transcription.
Clarify the misconception about primers: Unlike DNA polymerase, RNA polymerase does not require a primer to initiate RNA synthesis. It can start RNA synthesis de novo.
Differentiate between transcription and splicing: RNA polymerase is involved in transcription, not splicing. Splicing is a separate process where introns are removed from pre-mRNA, typically carried out by spliceosomes.
Review the correct statement: The correct statement is that RNA polymerase synthesizes RNA by adding nucleotides to the 3' end of the growing RNA strand, which aligns with its role in transcription.
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