Microbiology: An Evolving Science (Fourth Edition)
Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 22.1, Problem 1TQ
Summary Introduction

To review: 

The importance of oxidation state of cycled compounds for their acquisition, usability, and potential toxicity.

Introduction:

Microbes are essential for the proper functioning of biogeochemical cycles. There are predominantly six compounds which are recycled and used by organisms: carbon, oxygen, nitrogen, hydrogen, phosphorus, and sulfur. The elemental composition of microbes depends largely on the species and conditions available for their growth.

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You aim to test the hypothesis that the Tbx4 and Tbx5 genes inhibit each other's expression during limb development. With access to chicken embryos and viruses capable of overexpressing Tbx4 and Tbx5, describe an experiment to investigate whether these genes suppress each other's expression in the limb buds. What results would you expect if they do repress each other? What results would you expect if they do not repress each other?
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