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AS Questions - MC

AS Questions - MC. Macromolecules. Guiding Questions. 1. How does alpha glucose differ from beta glucose? 2. How does glucose differ from galactose ? 3. How does alpha galactose differ from beta galactose ? 4. How does fructose differ from glucose?

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AS Questions - MC

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  1. AS Questions - MC Macromolecules

  2. Guiding Questions • 1. How does alpha glucose differ from beta glucose? • 2. How does glucose differ from galactose? • 3. How does alpha galactosediffer from beta galactose? • 4. How does fructose differ from glucose? • 5. How does fructose differ from ribose?

  3. Straight Chain Monosaccharide

  4. Alpha & Beta Glucose • Alpha Glucose = on 1’-Carbon, OH is BELOW the ring with the CH2OH on the 5’-Carbon ABOVE the ring. • Stereoisomer, so cis or trans? • Beta Glucose = on 1’-Carbon, OH is ABOVEthe ring with the CH2OH on the 5’-Carbon ABOVE the ring. • More or less stable than alpha? Why?

  5. Monosaccharides • How does Glucose differ from the other monosaccharides?

  6. Are there alpha, beta Galactoses? •  Are these galactoses? How do you know? • Which one(s) are alpha-galactose? How do you know? • Which one(s) are beta-galactose? How do you know?

  7. Fructose v. Ribose Fructose / Ribose has how many carbons? How many carbons in the ring?

  8. Alpha or beta Ribose?

  9. Identify which stereoisomer • Alpha or Beta glucose, galactose or fructose?

  10. Synthesis

  11. Glycosidic Linkages • Alpha 1-4 • Straight chain • Alpha 1-6 • Branching

  12. Sexy Polysaccharides Starch is composed of 2 forms: Amylose (unbranched)25% of starch Amylopectin (branched)75% of starch

  13. Starch v. Glycogen Branching

  14. Amylose v. Amylopectin

  15. Cellulose • Only one with BETA glycosidic linkages • ONLY Beta 1-4 • No 1-6 • No branching, no helix just a straight line • Hydrogen bonding?

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