Multiple Choice
What marks the transition to the elongation stage of transcription in bacteria?
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15. Gene Expression
Steps of Transcription
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Which enzyme synthesizes RNA during transcription?
A
Helicase
B
DNA polymerase
C
Ligase
D
RNA polymerase
Verified step by step guidance1
Understand the process of transcription: Transcription is the process by which a segment of DNA is copied into RNA, particularly mRNA, by the enzyme RNA polymerase.
Identify the role of RNA polymerase: RNA polymerase is the enzyme responsible for synthesizing RNA from a DNA template during transcription.
Differentiate between the enzymes: Helicase unwinds the DNA double helix, DNA polymerase synthesizes DNA, and ligase joins DNA fragments. None of these are involved in synthesizing RNA.
Recognize the correct enzyme: RNA polymerase binds to the DNA at a specific region called the promoter and initiates the synthesis of RNA by adding ribonucleotides complementary to the DNA template strand.
Conclude with the correct answer: Based on the roles of the enzymes, RNA polymerase is the enzyme that synthesizes RNA during transcription.
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