Campbell Essential Biology with Physiology (6th Edition)
Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 11, Problem 16PS

a.

Summary Introduction

To determine:  The effects of mutation of regulatory gene in which repressor will not bind to lactose, mutation of operator in which repressor will not bind to operator and mutation of regulatory gene in which repressor will not bind to operator.

Introduction:

Operon can be defined as a set of adjacent structural genes with adjacent regulatory signals that affect transcription of the structural genes. Each operon is consisted of structural genes, promoter. An operator is a DNA segment that turns the gene on and off. It interaction with proteins increases or decrease the rate of transcription from occurring thus make an operon inducible or repressible. And promoter is segment of DNA where RNA polymerase binds to begin the transcription protein. lac operon is an inducible operon in which structural gene Z, Y, and A are induced in the presence of lactose.

To determine:

The effects of mutation of regulatory gene in which repressor will not bind to lactose.

b.

Summary Introduction

To determine:

The effect of mutation of operator in which repressor will not bind to operator.

c.

Summary Introduction

To determine:

The effect mutation of regulatory gene in which repressor will not bind to operator.

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