any proton donor (H+); low pH, neutralize bases. Examples: HCl, vinegar, -COOH,

polysaccharides used to gel liquids for bacteria media and human foods including ice cream. Does not melt at room temperature like gelatin. Only a few marine bacteria can digest agar. Agar is obtained [..]

an immune reaction of the body which causes discomfort and possible harm.

organic acids bearing -NH2 group; building blocks of proteins.

several sizes of structurally similar protein molecules which are able to bind to specific proteins or other substances; forming a main line of defense in animals against foreign items.

neturalize acids producing a salt; cause high pH. Examples: lye, -OH, ammonia,

organic compounds made by living organisms: proteins, vitamins, fats, etc

production of light by living organisms: fireflies, photobacteria, glowworm

green molecule in plants; red in bacteria; needed for making glucose (a sugar) from light energy and carbon dioxide and water.

a group of atoms chemically bonded together; bonding follows definite rules of nature