Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 5, Problem 7TYU

(a)

Summary Introduction

To evaluate:

An experiment was designed and conducted to analyze the uptake of sucrose in the plant cells. (a) The hypothesis for the decrease in pH, if plant cells are immersed in a sucrose solution. (b) The result obtained, if an inhibitor of the ATP regeneration was added in the beaker once the pH reached a steady level.

Introduction:

The plant cells were immersed in a sucrose solution in a beaker. The movement of the sucrose and water ions will take place by the process of diffusion and osmosis respectively in the beaker. The hypothesis given by the scientists proposes the movement of the hydrogen and sucrose ions inside the plant cells through the plasma membrane with the help of the co-transporter protein channels.

To evaluate: The hypothesis for the decrease in pH, if the plant cells are immersed in a sucrose solution.

(b)

Summary Introduction

To determine: The result that was obtained, if an inhibitor of ATP regeneration was added in the beaker once the pH reached a steady level.

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An  experiment is designed to study the mechanism of sucrose uptake by plant cells. Cells are immersed in a sucrose solution, and the pH of the solution is monitored. Samples of the cells are taken at intervals, and their sucrose concentration is measured. The pH is observed to decrease until it reaches a steady, slightly acidic level, and then sucrose uptake begins. (1)Rank the steps from first to last. To rank items as equivalent, overlap them.

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