740770
Description
Flashcards by jazzballet, updated more than 1 year ago
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Created by jazzballet
over 10 years ago
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| Question | Answer |
| monosaccharaides | glucose C6H12O6 |
| test for reducing sugars | small amount of food sample (if not already liquid-grind with water) add = benedict reagent heat for 5 minuets orange-brick red = reducing sugar |
| disaccharides | glucose+glucose=maltose glucose+fructose=sucrose glucose+galactose=lactose |
| when 2 molecules join and a water molecule is removed...... | ......condensation reaction-glycosidic bond |
| when water is added to the disaccharide and bond are broken | hydrolysis |
| test for non-reducing sugars | if not liquid grind with water add dilute hydrochloric acid and heat for 5 minuets (acid will hydrolyse disaccharides) add sodium hydrogencarbonate to nutralise. add benedicts reagent and heat orange brown- brick red=reducing sugars |
| test for starch | add iodine to the sample black/blue= starch |
| starch brake down | physical brake down in the mouth-teeth(large SA) salivary amylase hydrolyse starch into maltose stomach acid denatures them SI-pancreatic amylase hydrolyse starch to maltose...and lining produces maltase-enzyme that hydrolyses maltose into alpha glucose |
| lactose intolerance | some people don't produce lactase so lactose is not hydrolysed. in LI microorganisms brake it down producing gas=bloating, nausea, diarrhea, cramps. |
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