Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 30.2, Problem 2TC
Summary Introduction

To explain: The effects on the global climate when the Montreal protocol had not been implemented and ozone-depleting chemicals continued to be released in ever-increasing amounts.

Introduction: UV (Ultraviolet) is an electromagnetic radiation with wavelength from 10 nm coming from the Sun and has a very damaging effect on living organisms. It is responsible for skin damage, aging, sunburn, and cancer. Ozone is a protective layer that filters about 97 % of the UV before it reaches the Earth’s surface.

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The metabolic pathway below is used for the production of the purine nucleotides adenosine monophosphate (AMP) and guanosine monophosphate (GMP) in eukaryotic cells. Assume each arrow represents a reaction catalyzed by a different enzyme. Using the principles of feedback inhibition, propose a regulatory scheme for this pathway that ensures an adequate supply of both AMP and GMP, and prevents the buildup of Intermediates A through G when supplies of both AMP and GMP are adequate.
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