Transcription
A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called

attenuation
corepression
activation
desiccation

ANSWER DOWNLOAD EXAMIANS APP

Transcription
The sigma factor

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

ANSWER DOWNLOAD EXAMIANS APP