Biology-Biological Molecules: Starch 0.0 / 5 ? BiologyBiological molecules, organic chemistry and biochemistryA2/A-levelAQA Created by: tonishaxCreated on: 01-10-23 19:03 Starch is an energy store for what? plants 1 of 27 it is _______ into dense ______ grains? is compacted into dense insoluble grains 2 of 27 It is stored in a special organelle called what? amyloplast 3 of 27 Structure ------------- Starch is a ? polysaccharide 4 of 27 Made up of? 2 different polysaccharides 5 of 27 What are they? amylose amylopectin 6 of 27 AMYLOSE -------------------- Amylose is a long chain of? alpha glucose 7 of 27 joined together by? 1,4 glycosidic bonds 8 of 27 As it forms it ______ into a ______ shape? it coils into a helix shape 9 of 27 This makes it more? compact 10 of 27 To fit more _____ into a _____ space? more glucose into a small space 11 of 27 This means each amylose molecule only has ? 2 accessible ends 12 of 27 Where the _____ enzyme can bind? amylase 13 of 27 To break it down back into? glucose 14 of 27 This means amylose is broken down very? slowly 15 of 27 Making it a not? a very efficient store of energy 16 of 27 AMYLOPECTIN ------------------ This is a long chain of? alpha glucose 17 of 27 Joined with? 1,4 glycosidic bonds 18 of 27 However it also has what? branches 19 of 27 attached with? 1,6 glycosidic bonds 20 of 27 This makes it a very ? branched structure 21 of 27 This is beneficial as? The additional 1,6 glycosidic bond allows amylopectin to have more accessible ends 22 of 27 This results in quicker? release of glucose 23 of 27 To provide? energy e.g. respiration 24 of 27 This is because it is more easily? broken down by enzymes 25 of 27 And? hydrolysed 26 of 27 Starch is insoluble? so it wont affect water potential osmosis and conc grad 27 of 27
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