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Chapter 6, Problem 8SA
Summary Introduction

To analyze:

How E. coli is able to survive in an environment with lactose and no glucose.

Introduction:

Although E. coli uses glucose as its primary source of energy, it has alternate pathways by which it can metabolize lactose.

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Students have asked these similar questions
When lactose is added to growing culture of E. coli, the cells begin to make enzymes necessary for lactose utilization. In contrast, when tryptophan is added to the culture medium, synthesis of the enzymes for tryptophan pathway ceases. Contrast the two systems explaining why they act in reverse directions
If an E. coli cell lost the ability to use the pentose phosphate pathway, which amino acids would it require as growth factors?
“Lactose-intolerant” people have a shortage of lactase, the enzyme that breaks down lactose in milk. As a result, they sometimes develop cramps, bloating, or diarrhea after consuming dairy products. Suppose such a person ate yogurt that contains bacteria that produce lactase. Why would eating yogurt likely provide at best only temporary relief of the symptoms?
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Microbial Nutrition and Growth; Author: Scientist Cindy;https://www.youtube.com/watch?v=rK3UkyWjkl8;License: Standard YouTube License, CC-BY