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Rho-dependent and rho-independent transcription termination mechanisms operate in prokaryotes. Rho independent termination mechanism involves
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- Binding of the rho protein upstream of the termination element
- No protein factors and only RNA secondary structure and run of ‘U’ s
- Presence of UGA or UAA stop codons
- Binding of accessory factors at termination signal
Correct Option: B
Intrinsic termination (also called Rho-independent termination) is a mechanism in prokaryotes that causes RNA transcription to be stopped.[1] In this mechanism, the mRNA contains a sequence that can base pair with itself to form a stem-loop structure 7-20 base pairs in length that is also rich incytosine-guanine base pairs. These bases form three hydrogen bonds between each other and are therefore particularly strong.[strong.[2] Following the stem-loop structure is a chain of uracil residues.
