Define a polyunsaturated fatty acid. Draw, label, and describe the structure of a phospholipid. Include the head region, the tail region, hydrophobic region, and hydrophilic regions Draw the structure of a typical steroid. Describe the function of steroids. Each of the following structural formulas shows a fatty acid molecule. On the line, identify the fatty acid as saturated, unsaturated, or polyunsaturated. H H H H C -C- C -C -C-C-C-C 1. - - - H. H. H H OH H H H. .C -C- C 2. C- C- C H H H. OH C -C- H. H-C-C -c H H H HHHHHHHH H H H H HHHH 3. H-C-C- C-C-C-C-C-C-C C-C- H HH H HHHHH IHHHH HO, Explain the two types of nucleic acids (DNA, RNA) by their structure, characteristics and functions. 6. Explain the structure and pairing of the nucleotides of nucleic acids. Draw and label a picture of a nucleotide. Explain the relationship between nucleic acids and proteins. HIC -O- -C-