Chapter 4: Biological Molecules

Made of carbon, hydrogen, oxygen source of energy for body 3 types: monosaccharides: simplest form, glucose, easy digest disaccharides: 2 monosaccharides together polysaccharides: large chain of monosaccharides (starch made of chains of glucose and glycogen), longer digest

Mono/disaccharide (glucose, glycogen): Benedict’s Test Polysaccharides (starch): Iodine Test Benedict’s test: positive= brick red, negative= blue Iodine Test: positive= blue-black, negative= yellow

carbon, hydrogen, oxygen Made of triglycerides 1 glycerol molecule bonded to 3 fatty acid chains 2 groups of lipids: Fat (solid at room temp), Oil (liquid at room temp) source of energy and cushioning for organs

emulsion test/ Sudan III test positive: milky-white emulsion negative: no emulsion

repair and build body tissues, enzymes made of long chains of amino acids made of carbon, hydrogen, oxygen, nitrogen, and sulfur. 3 types: amino acids, peptides, polypeptides

Biuret test Positive: Purple Negative: Blue