Scelta multipla
Which of the following components is involved in the initiation of transcription?
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15. Gene Expression
Introduction to Transcription
Scelta multipla
Which of these subunits are found in the RNA polymerase core enzyme of E. coli?
A
β, β', σ, ω
B
α, β', σ, ω
C
α, β, σ, ω
D
α, β, β', ω
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Understand the structure of the RNA polymerase core enzyme in E. coli. The core enzyme is responsible for the synthesis of RNA from a DNA template.
The core enzyme of RNA polymerase in E. coli is composed of multiple subunits. These subunits work together to perform the function of transcription.
Identify the subunits that are part of the core enzyme. The core enzyme specifically includes the subunits α, β, β', and ω.
Note that the σ subunit is not part of the core enzyme. It is a separate factor known as the sigma factor, which associates with the core enzyme to form the holoenzyme, initiating transcription.
Therefore, the subunits found in the RNA polymerase core enzyme of E. coli are α, β, β', and ω.
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