Prescott's Microbiology
Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 14.2, Problem 3CC
Summary Introduction

To explain: The “decision-making” process used by an E. coli cell growing in a medium containing arabinose, no glucose, and lacking tryptophan.

Introduction: Various regulatory “decisions” are made by microbial cells depending on the presence or absence of substrate or product. If the substrate of the pathway is present in the environment and a preferred carbon and energy source is not, then microbial cells synthesize the enzymes of a specific catabolic pathway. Conversely, the synthesis of enzymes is inhibited, when the end product of the pathway is present.

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Chapter 14 Solutions

Prescott's Microbiology

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