Transcription - Medical Science

Q1:

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

A activation

B attenuation

C corepression

D desiccation

ANS:B - attenuation

I believe the answer should be corepression because the tryptophan act as a co-repressor to shut the transcription (termination).