Identify a, b, c.

(a) Elongation, (b) Termination, (c) Initiation

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(a) Initiation, (b) Termination, (c) Elongation

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(a) Initiation, (b) Elongation, (c) Termination

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(a) Termination, (b) Elongation, (c) Initiation

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Solution

The correct option is B (a) Initiation, (b) Termination, (c) Elongation
The diagram represents different stages of transcription.
RNA polymerase transiently associates with the initiation factor (σ) and binds to promoter, initiating transcription (image a).

RNA polymerase then facilitates opening of the helix and continues elongation (image c).

Once the polymerase reaches the terminator region, it transiently associates with the termination-factor (ρ) and the nascent RNA along with the RNA polymerase falls off. This results in termination of transcription (image b).

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