C: How many simple and mixed triacylglycerols can be constructed from glycerol, stearic acid, and oleic acid? Draw the structure of triacylglycerols which will have the lowest and highest melting point 3. Following are the melting points of 18-carbon fatty acid Stearic acid Oleic acid Linoleic acid 70 °C 13.4 °C -5.0 °C Linolenic acid -11.0 °C Answer following: a: What do you mean by the melting point of lipids? and name the following b: What could be the reason for the differences in melting point?

The pH vs charge graph for a triprotic amino acid is shown below. Please answer the following questions about the amino acid. 2 1.5 1 0.5 -0.5 -1 4 6. 8 10 12 14 pH a. Which of the following triprotic amino acids is this? [ Select ] b. What is the isoelectric point? (Please select the appropriate range in which the isoelectric point falls) (Hint - look up the pka values in the pKa table for amino acids, which was in video one of today's lecture) [ Select ] c. What form of this amino acid dominates at a pH of 8? Please select the correct form for each ionizable group. Alpha amino [ Select ] Alpha carboxyl [ Select ] R [ Select ] Net Charge

1. The figure below shows the Fischer projection of an L-aldohexose. T or F O. НО H- Но H- Но- ČH2OH Naturally occurring saturated long-chain fatty acids are usually in trans- configuration. 2. T or F 3. N-acetylglucosamine is commonly found in glycosaminoglycans. T or F 4. The isoelectric point of isoleucine is lower than that of histidine. T or F 5.. At pH 7, all amino acids stop migrating in isoelectric focusing. T or F 6. The following amino acid is a L-valine. T or F СООН H-NH2 CH-CH3 CH3 7. Salting out is a process to remove salts from proteins. T or F 8. There are five carbons in a pyranose ring. T or F 9. Hydrophobic interaction can be found in protein and DNA. T or F RNA is a polymer consisting of nucleosides joined together by phosphodiester bonds. 10. T or F 11. There are 3.6 base pairs in one turn of DNA helix. T or F

Given the following compounds, assemble the structure of the lipid constituent for the cell membrane appropriate to study the following: a. a thermophilic bacteria thriving in a hot spring b. a hepatocyte of a sea lion in the artic ocean c. a frog neurocyte