Multiple choice

Transcriptional regulation in prokaryotes can occur by

  1. a repressor binding an operator and preventing transcription

  2. an activator binding upstream from a promoter and positively affecting transcription

  3. different promoter sequences binding RNA polymerase more highly, resulting in more effective transcriptional ignition.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option a refers to the lac and trp repressors, option b to the CRP protein, and option c refers to prometer that have different transcriptional efficiencies.

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