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De-starching the Leaves of a Plant

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De-starching the Leaves of a Plant 'De-starch (or Destarch) the leaves of a potted plant' is one of the preliminary steps in a  photosynthesis experiment . Biology students often ask the following questions about de-starching. What is  the definition of de-starching? Why it is necessary to de-starch the leaves of a plant before conducting photosynthesis experiments? What happens to the starch stores when the potted plant is deprived of light or carbon dioxide? How to de-starch the leaves of a plant? What is the definition of de-starching? De-starching is the process by which the starch reserves in a plant are depleted by depriving the plant of either light or carbon dioxide.  Why is it necessary to de-starch the leaves of a plant before conducting photosynthesis experiments? We test for the presence  of starch  in leaves in order to determine that photosynthesis has occurred. Glucose -  the p...
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Ethanol Emulsion Test for Fats and Oils

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Ethanol Emulsion Test for Fats and Oils The  Ethanol Emulsion Test  is a  food test  which determines the presence of a broad group of naturally occurring compounds known as  lipids . Lipids consist of  fats  and  oils . Other lipid tests include the  Grease Spot Test  and the  Sudan Stain Test . The Grease spot test is performed on fats - lipids which are solid at room temperature. Sudan stain colours lipids red, but is a less common bench reagent than ethanol. The Ethanol Emulsion Test is the most common test amongst the three. Procedure Solid sample  Crush  the food sample and place in a dry test tube. Add ethanol  to about 2 cm3 above the level of the sample and shake thoroughly. Allow the solid to  settle  (about 3 min) to allow the lipid to be extracted. Decant  the ethanol into another test tube. Add 2 cm3 of  deionized water  to the second test tube ...
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CAPSTONE LEARNING BIOLOGY BOOK 1

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 Capstone Learning Biology Book 1  Udo, K. W ( Raphael)  PGDE  ( Uniuyo)  HND  ( Microbiology)  C Capstone Learning  First Published 2018 by :  Jehub Publishers, Inc. ( Ubprint)  52 AfahaEket Road, Eket  ISBN: 978-9978-8509-4-7 Copyright information : The copyright of this book belongs to Raphael  Udo (Kufre ).  The Copyright of this book is strictly prohibited. Anyone found in breach of the copyright without permission will be prosecuted.  Dedication  This book is dedicated to Almighty God, the giver of wisdom and to my lovely wife Sarah  Raphael Udo.    Preface  The purpose of this book is to provide a brief summary and a standard textbook for Biology students in senior secondary schools.  Again, to guide learners  to revise successfully and to receive adequate  knowledge in  Biology . In  all the chapters of the book, basic concepts are clearly presented in a simple...
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