Procedure 5.3 Biuret’s Test for Protein
a) Which contains more protein, egg albumen or honey?
b) Do free amino acids have peptide bonds?
c) What is a positive test for protein?
Procedure 5.4 Sudan IV Test for Lipids
a) Is salad oil soluble in water?
b) Compare tubes 1 and 2. What is the distribution of the dye with respect to the separated water and oil?
c) What observation indicates a positive test for lipid?
d) Does honey contain much lipid?
Question 5: Grease-spot test
a) Which food products that you tested contain large amounts of lipid?
Diagram a of DNA including the phosphate, pentose sugar, and nitrogenous base (5pts).
Exercise 5: Biologically Important Molecules cont.
Nucleic Acids cont.