4793627
Description
Flashcards by Bee Brittain, updated more than 1 year ago
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Created by Bee Brittain
about 8 years ago
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| Question | Answer |
| lots of monomers are called | polymer |
| Name 3 Monosaccharides | Glucose Fructose Galactose |
| Name 3 Disaccharides | Maltose Sucrose Lactose |
| Maltose = | a-glucose + a-glucose |
| Sucrose = | a-glucose + fructose |
| Lactose = | a-glucose + galactose |
| Glucose has 6 carbons. What type of sugar is it? | Hexose Sugar |
| a-glucose and b-glucose are ISOMERS. What does this mean? | Isomers have the same chemical formula, but the atoms are arranged in a different way |
| What is the difference between the alpha glucose and beta glucose isomers? | The OH group is at the bottom on an alpha glucose, but flipped to be at the top on a beta glucose |
| Two monosaccharides made a .... | disaccharide |
| A disaccharide is made in what type of reaction? | Condensation |
| What is produced in a condensation reaction? And what is the bond formed between two monosaccharides? | In a condensation reaction, water is produced. The bond formed is a glycosidic bond |
| Disaccharides/Polysaccharides are broken down in what type of reaction? What is required for this reaction? | Hydrolysis Reaction and a molecule of water is needed |
| What regent is used in the test for reducing sugars? | Benedict's Regent |
| Vaguely describe the steps of the Benedicts test: | - Add Benedict's to solution that is to be tested - Add heat - If reducing sugar is present, solution should turn a red colour |
| What is a reducing sugar? | A reducing sugar, reduces something else, taking its electrons. But it also gets oxidised, donating/losing its electrons too. (In a reaction, this would happen simultaneously) |
| In the test for non-reducing sugars, what acid is used to break the glycosidic bond between the disaccharide? | Hydrochloric Acid (HCl) + (heat) |
| After breaking the glycosidic bond, what is the next step in testing for a non-reducing sugar? | Add sodium hydrogencarbonate |
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