Refer to the following scenario to answer the question. Scientists are studying compounds in a newly discovered rain forest plant. The plant produces an unusual substance that local people from the area say acts as an anesthetic. One scientist tested the substance with the chemical indicator Sudan III. If the test is negative which type of macromolecule is not present in the substance?
A. Nucleic Acid
B. Lipid
C. Carbohydrate
D. Protein