Transcription
Which of the following enzyme(s) is/are required for lactose fermentation?

Transacetylase
β-galactosidase
Galactoside permease
All of these

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Transcription
The sigma factor

recognizes the promotor
is responsible for recognizing the termination sequence
provides the catalytic function of cleaving off pyrophosphates during mRNA synthesis
accomplishes DNA restriction

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