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Section 2 Molecules of Life

Section 2 Molecules of Life. Pg. 55. Carbohydrates. Organic compounds composed of carbon, hydrogen, and oxygen in a ratio of 1:2:1 Carbohydrates can exist as 1) monosaccharides (simple sugar) 2) disaccharides (double sugar) 3) polysaccharides (“many” sugars).

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Section 2 Molecules of Life

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  1. Section 2 Molecules of Life Pg. 55

  2. Carbohydrates • Organic compounds composed of carbon, hydrogen, and oxygen in a ratio of 1:2:1 • Carbohydrates can exist as 1) monosaccharides(simple sugar) 2) disaccharides (double sugar) 3) polysaccharides (“many” sugars)

  3. Glucose is a very important sugar to living things. • Glucose, hence carbohydrates, are the most important source of energy for our cells.

  4. Monosaccharides- simple sugars • Glucose • Fructose • Galactose • They can be combined to form a disaccharide by a ? reaction. CONDENSATION

  5. Isomers- same formula but slightly different structure • glucose C6H12O6

  6. Polysaccharides & examples • Composed of three or more monosaccharides especially glucose 1) glycogen 2) starch • Animals store glucose as glycogen.

  7. Plants store glucose as starch. Another large polysaccharide is cellulose

  8. Proteins • Compounds made of carbon, hydrogen, oxygen, and nitrogen

  9. Proteins make up hair, skin, muscles, enzymes, and horns

  10. Amino acids- the building block or subunit of proteins • There are 20 amino acids and they are linked together by peptide bonds to form proteins. • A ? reaction is the process that links them together. CONDENSATION

  11. A peptide bond forms between 2 amino acids… • The peptide bond forms between the C, H, N, O.

  12. Happy Halloween!!!!

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