Unformatted text preview: Observation: bacteria wouldn’t grow near mold • Hypotheses: the mold releases a substance that kills off bacteria • Experiment: extracted fluid from mold and it inhibited bacterial growth. That fluid was later isolated and called penicillin (1 st antibiotic). The Noble Prize in Physiology or Medicine 1945: Alex Fleming and two others: “For the discovery of penicillin and its curative effect in various infectious diseases.” CHAPTER 2: Atoms, Molecules, and Life What are Atoms? • Atom: the basic structural unit of matter o –i.e., the smallest pieces of stuff o Protons- +1 o Electrons- -1 o Opposites attract Different elements have different number of protons. Element: 1. Defined by number of protons = atomic number 2. Has specific physical and chemical properties 3. Can’t be broken down by chemical reactions...
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This note was uploaded on 04/07/2011 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.
- Spring '08