Chapter 18, Problem 12PIAT

Summary Introduction

To review:

Whether the genes are transcribed when LuxR is bound or not bound to the DNA (deoxyribonucleic acid) regulatory sequence.

Introduction:

The light-producing genes are organized and operate under positive control. In molecular biology, positive regulation implies that a transcription factor is required to bind at the promoter site in gene to enhance RNA polymerase to initiate transcription. The activator that functions in this operon is LuxR. This activator is responsible for the emission of the light. The light-producing genes of V. fischeri are organized in an operon that is under positive control by an activator protein called LuxR.