[Solved] You isolate a compound that is insoluble in water, has alternating single and double bonds and has a bright orange color. You correctly conclude that this compound is a: A) protein B) nucleic acid C) polysaccharide D) steroid E) carotenoid Microscopic Examination: The analysis of small objects or structures that cannot be seen with the naked eye, using a microscope. Epithelial Cells: Cells that line the surfaces of the body, such as skin, blood vessels, urinary tract, and organs, providing protection, absorption, and secretion functions. Bacteria: Microscopic, single-celled organisms found in virtually every environment on Earth, some of which are beneficial while others can cause diseases. Alkaline: Relating to or denoting substances that have a pH greater than 7, characterized by the presence of hydroxide ions (OH-).