CAMPBELL BIOLOGY >CUSTOM<
CAMPBELL BIOLOGY >CUSTOM<
14th Edition
ISBN: 9781269868235
Author: Reece
Publisher: PEARSON C
bartleby

Concept explainers

bartleby

Videos

Textbook Question
Chapter 18, Problem 18.1CR

Compare and contrast the roles of a corepressor and an inducer in negative regulation of an operon.

Expert Solution & Answer
Check Mark
Summary Introduction

To compare: The functions of a corepressor and an inducer in negative regulation of an operon.

Introduction: Gene regulation is the process through which the cells control the expression of genes. It controls genes that are expressed to form a specific functional protein depending on the cell type. There are mechanisms that control gene expression at different levels.

Explanation of Solution

Operon contains coding DNA sequences, regulatory DNA sequences, and the regulatory proteins. Regulatory proteins act as both activators (TURN ON) and repressors (TURN OFF) of genes.

The similarities between corepressor and an inducer in negative regulation of an operon are as follows:

  • Both are small molecules that bind to the repressor protein present in an operon, causing the repressor to change its shape.

The differences between the roles of a corepressor and an inducer in negative regulation of an operon are as follows:

CharacteristicsCorepressorInducer
Role in negative regulation of an operon

A corepressor binds to the repressor protein, activates it to bind to the operator, and thereby inhibits transcription.

For example, tryptophan acts as a corepressor in a trp operon.

The binding of an inducer to the repressor protein makes it inactive and allows transcription of operon genes.

For example, allolactose acts as an inducer in lac operon and binds to the lac repressor; hence, it cannot bind to the operator.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Compare and contrast the roles of a corepressor and an inducer innegative regulation of an operon.
Describe the difference between a repressible and an inducible operon.
compare and contrast the regulation of the lac operon and the trp operon.

Chapter 18 Solutions

CAMPBELL BIOLOGY >CUSTOM<

Additional Science Textbook Solutions

Find more solutions based on key concepts
Knowledge Booster
Biology
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
    • SEE MORE QUESTIONS
    Recommended textbooks for you
  • Biology (MindTap Course List)
    Biology
    ISBN:9781337392938
    Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
    Publisher:Cengage Learning
  • Biology (MindTap Course List)
    Biology
    ISBN:9781337392938
    Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
    Publisher:Cengage Learning
    QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY