Why is cholesterol an important steroid?.

35. what do you call the most common carbohydrates?

4. Of the following amino acids, which is least likely to form strong interactions with other amino acids that contribute to the tertiary structure of a given protein? A. Histidine B. Glutamate C. Cysteine D. Glycine E. Serine

1. Classification, structure and properties of higher fatty acids, their biological role.

9. What is sphingosine? For lipids with a sphingosine backbone, to what carbons are the other functional groups attached? How many acyl tails attach to sphingosine to make a sphingolipid? 10. Compare and contrast the structure of sphingomyelins with glycerophopholipids. 11. Which of the following statements is true? Please briefly explain why the false statements are false. A. Phosphatidylcholine and sphingomyelin are evenly distributed at the two monolayers of plasma membrane. B. Phosphotidylserine is enriched at the inner leaflet of transport vesicles. C. In sphingolipids, the fatty acid tail is linked to its backbone via an ester bond. D. Common glycerophospholipids often carry positive charges at physiological pH. E. Lipases are enzymes that can cut structural lipids at different locations

14. This molecule is: -Monounsaturated fatty acid Trans -Cis polyunsaturated fatty acid -Trans polyunsaturated fatty acid -Saturated fatty acid -Cis monounsaturated fatty acid

4. Predict the products (draw their structures) of the fatty acid with the reagents below. (a) + CH;OH HO. (b) OH HO.

8. Draw and give the name of the following lipid compounds: A. a saturated fatty acid with 18 carbons B. a monounsaturated cis fatty acid with 16 carbons C. any omega-3 fatty acid D. a triglyceride that contains three esters with 14-carbon saturated fatty acids E. any corticosteroid

5. Classify each of the following amino acids as polar or nonpolar and hydrophilic and hydrophobic. NH2 CH2 CH2 H2N-C-COOH H2N-C-COOH H. a. b. Polar or nonpolar: Hydrophilic or Hydrophobic:

1. Draw the structure of the following triacylglycerols (TAGS) a. 1,2-dioleoyl-3-myristyl-sn-glycerol b. sn-16:0-12:0-16:0 C. LLnO