Lesson 3 Outline_Carbs

Lesson 3 Outline_Carbs - Lecture 1: Chemistry of Food...

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Lecture 1: Chemistry of Food Carbohydrates Lesson 3 1. Carbohydrate structure & 2  types of carbohydrates -Made of carbon and hydrogen, they are organic. -Carbohydrate-rich foods (whole grains, legumes, fruits, and vegetables) - provide lots of energy 4 cal/g -contain vitamins, minerals, dietary fiber, and phytochmicals 2 types 1) Simple Carbohydrates=sugars 2) Complex polysaccharides (starch, dietary fiber) 2. Simple sugars:  monosaccharides and disaccharides  -Monosaccharides- consist of a single sugar molecule -Glucose, Fructose, Galactose       -Dissacharides- consist of two sugar molecules -Sucrose, Lactose, Maltose -ose ending means simple sugar 3. Monosacchride structure and examples   -All monosaccharides have same formula C 6 H 12 O 6   -Hexose Sugars have 6 sides -Glucose- most abundant simple sugar in nature - primary source of fuel in body -doesn’t usually exist as monosaccharide -Galactose     OH up 1
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Lesson 3 -Pentose Sugars have 5 sides      -eg Fructose- occurs naturally in fruit and vegetable, used as a sweetener.   4. Disaccharide structure and examples- consist as 2 monosaccharides linked together Sucrose= Glucose+Fructose   (table sugar) Beta 1,5 linkage Lactose=Glucose+Galactose (milk sugar)  Beta 1,4 linkage Maltose=Glucose+Glucose (starch breakdown) alpha-1,4 linkage 5. Complex carbohydrates- polysaccharides are chains of 2 or more simple sugar molecules.  Repeating monosaccharide units make up the structure.   2 Types of Complex carbs 1) Startch- found in grains, legumes, tubers -composed of entirely glucose units -takes two forms. i) Amylose- straight chains of glucose, alpha 1,4 bonds ii) Amylopectin- branched chains of glucose - Almost all starch is digestible except Resistant Starch - which is found    In some legumes
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This note was uploaded on 03/30/2008 for the course FOOD SCI 120 taught by Professor Ingraham during the Spring '08 term at Wisconsin.

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Lesson 3 Outline_Carbs - Lecture 1: Chemistry of Food...

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