WHAT ARE ENZYMES?

What are enzymes?

Structure of Chymotrypsin, a protease enzyme which is active in the duodenum.

Enzymes are biological catalysts. A catalyst is a substance which speeds the rate of reaction but remains unchanged in the reaction. Catalysts reduce the activation energy needed for a reaction. Enzymes are proteins and occur naturally in living biological systems, acting in many metabolic pathways.

The activity of enzymes are affected by pH, temperature, enzyme concentration and substrate concentration. Enzymes have optimum pH and optimum temperatures, at which they experience maximal activity.

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De-starching the Leaves of a Plant

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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CAPSTONE LEARNING BIOLOGY BOOK 1

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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