Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 8, Problem 7TYU
Summary Introduction

To draw: The metabolic pathways with the help of arrows on the basis of the given statements.

Given data: The metabolic pathway is described with the help of the following statements:

1. L forms either N or M and M forms O.

2. O will form either R or P, R form S and P will form Q.

3. The reaction from L to M is inhibited by O.

4. The reaction from O to R is inhibited by S and from O to P is inhibited by Q.

The inhibition reaction should be drawn with the help of red colored arrows and a minus sign.

Introduction: The cell possesses an ability to regulate the pathways (metabolic) by controlling the activity of various enzymes. This is done by switching off or on the gene which encodes for particular enzymes. There would be occurrences of chemical chaos, if the metabolic pathways of a cell operate simultaneously, so they are operated distinctly.

Summary Introduction

To determine: Which of the given reactions from the branched metabolic pathway would prevail, if Q and S will be present in higher concentrations.

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DRAW IT Using a series of arrows, draw the branched metabolicreaction pathway described by the following statements, andthen answer the question at the end. Use red arrows and minussigns to indicate inhibition.L can form either M or N.M can form O.O can form either P or R.P can form Q.R can form S.O inhibits the reaction of L to form M.Q inhibits the reaction of O to form P.S inhibits the reaction of O to form R.Which reaction would prevail if both Q and S were present inthe cell in high concentrations?(A) L S M(B) M S O(C) L S N(D) O S P
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