BIOL 112 Study Guide - Midterm Guide: Sodium Dodecyl Sulfate, Lipid Bilayer, Phospholipid
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BIOL 112 Full Course Notes
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Biol 112 questions for midterm (with answers at the end: 100 bacterial cells are on leaf in the forest and grow for five doublings (cell divisions). After the fifth doubling, an amoeba comes along and eats of all the cells that are present (only. 1/4th of them are left) and then it wanders off. The remaining cells then grow for three more doublings (cell divisions) three times. The methods used to measure leucine uptake is the same method described in the lectures. Leucine was added at the time point show by the arrow where curve 1 represents leucine uptake by bacterial cell type 1 and curve 2 by bacterial cell type 2. For curve 1, radioactive tryptophan alone was added. For curve 2, the cells had been incubated with kcn (potassium cyanide) for 3 minutes before testing. Kcn blocks atp synthesis, and by 3 min after kcn treatment, atp levels in the cells are very low.
