Chapter 16 - Regulation and Gene Expression in Prokaryotes

Chapter 16 - Regulation and Gene Expression in Prokaryotes...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 16 Regulation of Gene Expression in Prokaryotes Prokaryotes exhibit efficient genetic mechanisms to respond to environmental conditions - adaptive certain enzymes produced only when specific chemical substrates are present o term replaced with inducible reflects the role of substrate serves as inducer in enzyme production - constitutive enzymes that are produced continuously, regardless of chemical makeup of environment - negative or positive control o negative control genetic expression occurs unless it is shut off by some form of a regular molecule o positive control transcription occurs only if a regulator molecule directly stimulates RNA production lactose metabolism in E. coli is regulated by an inducible system - cis-acting site single regulatory unit almost always upstream to the gene cluster it controls - trans-acting elements binding molecules that control transcription of the gene cluster - structural genes genes coding for the primary structure of the enzymes
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/17/2008 for the course BIOL 2500 taught by Professor Finger during the Fall '07 term at Rensselaer Polytechnic Institute.

Page1 / 2

Chapter 16 - Regulation and Gene Expression in Prokaryotes...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online