Flashcards
Carbohydrates
Cards in this deck (18)
- 1lots of monomers are calledpolymer
- 2Name 3 MonosaccharidesGlucose
Fructose
Galactose - 3Name 3 DisaccharidesMaltose
Sucrose
Lactose - 4Maltose =a-glucose + a-glucose
- 5Sucrose =a-glucose + fructose
- 6Lactose =a-glucose + galactose
- 7Glucose has 6 carbons. What type of sugar is it?Hexose Sugar
- 8a-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
- 9What 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
- 10Two monosaccharides made a ....disaccharide
- 11A disaccharide is made in what type of reaction?Condensation
- 12What 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
- 13Disaccharides/Polysaccharides are broken down in what type of reaction? What is required for this reaction?Hydrolysis Reaction and a molecule of water is needed
- 14What regent is used in the test for reducing sugars?Benedict's Regent
- 15Vaguely 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 - 16What 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)
- 17In the test for non-reducing sugars, what acid is used to break the glycosidic bond between the disaccharide?Hydrochloric Acid (HCl) + (heat)
- 18After breaking the glycosidic bond, what is the next step in testing for a non-reducing sugar?Add sodium hydrogencarbonate
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