Essential Cell Biology (Fourth Edition)
Essential Cell Biology (Fourth Edition)
4th Edition
ISBN: 9780815345251
Author: Bruce Alberts, Dennis Bray, Karen Hopkin, Alexander D. Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
Publisher: W. W. Norton & Company
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Chapter 12, Problem 9Q
Summary Introduction

To explain: The changes needed in passive transport mediate the transfer of solute down its concentration gradient across the membrane to convert transporter into a pump that moves the solute up its concentration  gradient by hydrolyzing ATP.

Introduction: In a cell to maintain an appropriate intracellular ion composition and to import solutes to a higher concentration, active transport of solutes against their electrochemical gradient is required. For this purpose, cells use transmembrane pumps to carry out the transport by ATP- driven pumps to hydrolyze ATP to continue the upward transport.

Summary Introduction

To explain: The need of each step in the conversion of transporter into a pump that moves to increase the concentration gradient of solute by hydrolysis of ATP.

Introduction: In a cell to maintain an appropriate intracellular ion composition and to import solutes to a higher concentration, active transport of solutes against their electrochemical gradient is required. For this purpose, cells use transmembrane pumps to carry out the transport by ATP- driven pumps to hydrolyze ATP to continue the upward transport.

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