1.3 Carbohydrates - disaccharides and polysaccharides 0.0 / 5 ? BiologyBiological moleculesASAQA Created by: scarletto_266Created on: 08-10-20 10:08 What is a disaccharide? Two monosaccharides joined together 1 of 10 Give three examples of disaccharides Maltose, sucrose and lactose 2 of 10 What are the pairings for these three disaccharides? glucose + glucose = maltose glucose + sucrose = fructose glucose + galactose = maltose 3 of 10 What bond is formed between two monosaccharides? Glycosidic bond 4 of 10 What is the test for non reducing sugars? First hydrolyse the sample with acid then complete the Benedict's test as normal 5 of 10 Why does the sample need to be hydrolysed with acid first? To break the disaccharide back into its monomer components so it will show a result with the benedict's test 6 of 10 What needs to be done before the acid hydrolysis? The Benedict's test needs to be completed first to make sure there's no reducing sugars that could give a false positive 7 of 10 Are polysaccharides soluble or insoluble? Insoluble 8 of 10 Why is this? Because they are very large molecules 9 of 10 What is the test for starch? Add iodine solution to the sample, if it turns from yellow to blue/black starch is present 10 of 10
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