level: extra biochem notes i didnt know
Questions and Answers List
level questions: extra biochem notes i didnt know
| Question | Answer |
|---|---|
| how does the tight helix structure of amylose help. | makes the molecule more compact and therfore can be stored more efficiently as it takes up less space |
| how much of starch is amylopectin and how much of it is amylose | 80% amylopectin, 20% amylose |
| how is starch suited from energy storage | being insoluble, it does not diffuse out of cells, amylose is a helicla structure and is compact, so a lot can be stored in a small space |
| what are the reagents used in non reducing sugar test | benedicts solutions, dilute hydrochloric acid, sodium, hydrogen carbonate |
| positive results for non reducing sugars | remains blue on first testing ; coloured precipitate obtained when tested again after hydrolysis |
| concentration for reducing sugars and what colour of solution of precpitate | none = low, very low = green, low = yellow, medium = brown, high = red |
| general formula for monosaccarhdies | (CH2O)n where 'n' can be any number from 3 to 7. |
| Monosaccharides are classified according to the number of carbon atoms in each molecule: | Pentose sugars (5 carbon atoms), Hexose sugars (6 carbon atoms) |