What do most amino acids have in common with most monosaccharides? O Both contain ionizable groups that lack pka values. O Both non-enzymatically attach themselves to nucleic acids. O Both are transported by albumin within the blood. Both exist as isomers, due to differences in stereochemistry.

1. (a) Arrange the following lipid molecules in the order of their relative melting points. Н.С — о-С-R Н.С — о-С-R H,C -0-ć- | НС —0—С-R НС —о-с-R' НС —о-с-R" H2C -0-Ċ-R H2C -0-C-R H2C -0-ċ-R" VI VII VIII (-olx). 0-ċ-R 180 —о-с-R 18-1 cisÃ9 -ċ-R") = 18:1transA9 (b) Give your reasons for your answer. (c) On heating lipid VI with aqueous NAOH, all the ester linkages were hydrolyzed. Draw the structure of each product of the hydrolysis. (e) Giving a reason for your answer, predict what would happen to the solubility of these products in water if, after the hydrolysis, excess acid was added to the medium to acidify it.

Identify the components of an amino acid in the following diagram. (a) ______________ (b) ______________ (c) ______________ (d) ______________

An amino acids unique property arises through which component? How does this same component contribute to the overall chemical nature of the protein?

Create an oligopeptide via dehydration synthesis using the following amino acids. O. H Tryptophan (TRP) C-C-N но сн, C-C-N. но Glycine (GLY) H H HN

The figure below illustrates the molecular structures of two fatty acids. A B H₂C The structural formula of erucic acid and behenic acid с H₂C D erucic acid behenic acid Which of the following best explains why erucic acid is liquid at room temperature but behenic acid is solid at room temperature? O OH The presence of a double carbon to carbon bond in erucic acid prevents the molecule from packing closely together. The lack of any double carbon-carbon bonds in behenic acid causes the molecule to be come polar and therefore packed more tightly. The larger number of carbon atoms in erucic acid prevents the molecule from packing tightly together. OH The smaller number of carbon atoms in behenic acid creates stronger covalent bonds between the carbon atoms allowing for them to pack more tightly together.

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