Carbon chemistry and Macromolecules powerpoint.ppt

Complex carbohydrates 2 structure plants make

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Complex Carbohydrates 2. Structure - Plants make cellulose (polysaccharide) - gives plants strength and rigidity - wood, lettuce - chitin – in animals – insects’ shells Tests for Carbohydrates: Benedicts – will turn green then orange when heated in the presence of monosaccharides Iodine test – turns blue black in the presence of starch
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Lipids Lipids = made mostly from Carbons, Hydrogens, Oxygens and are not soluble in water Include fats, oils, waxes Nonpolar – also called Hydrophobic which means afraid of water Can be used to store energy - 9 cal/g Present in cell membranes Cushion and protect organs Steriods synthesized by the body are lipids
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Lipids One type of lipid is a fatty acid - have a COOH group at one end and tail of carbon surrounded by hydrogen atoms
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Saturated or Unsaturated? saturated lipid = each carbon atom in fatty acid chains is joined to another carbon atom by a single bond - tails can fit next to each other closely - solid fats – animal fats – meat, dairy - butter Unsaturated lipid = one carbon-carbon bond in the fatty acid chain is a double bond - not saturated with carbon - more kinks – can’t solidify – can spread! - ex. Margarine Polyunsaturated lipid = two or more carbon-carbon bonds in the fatty acid chain are double bonds - not packed closely together – liquid at room temp - ex. vegetable oil – healthier - can saturate them – Crisco - unhealthy
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  • Spring '14
  • DeanC.Bratis
  • DNA, Glucose, Carbohydrate, Chemical bond, hydrogens

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