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Unformatted text preview: BIS2A Spring 08, section B- 1 st midterm- bioenergetics 1) The energy for photosynthesis is provided by a. The splitting of water b. The reduction of NADH c. The citric acid cycle d. The absorption of photons by chlorophyll e. Glycolysis 2) A scientific hypothesis is useful only if it is: a. Convincing b. Consistent with the facts c. Falsifiable d. Provable e. b and c 3) The chemical reaction A - B has a very large negative G. This means it will: a. Proceed b. Proceed very quickly c. Go backwards d. Be at equilibrium e. Go backwards very quickly 4) Bacterial respiration is described as more flexible than mammalian respiration because a. Bacteria can ferment as well as respire b. Bacteria can photosynthesize, ferment, and respire c. Bacteria can split water, to make oxygen d. Bacteria can use many terminal electron acceptors, while mitochondria can only use NAD + . e. Bacteria can use many terminal electron acceptors, while mitochondria can only use O 2 . 5) Photosynthesis is similar to respiration in that: a. Both processes consume O2 b. Both processes consume NADH c. Both processes produce ATP d. Both processes involve an electron transport chain e. c and d 6) The reaction NADH plus O 2- NAD + + H + + H 2 O occurs spontaneously (that is, progresses from left to right) under standard conditions. Its half reactions are written as: A: NAD + + H + + 2e-- NADH and B: O 2 + 2H + + 2e-- H 2 O Which half reaction has the greater Eo value? a. A b. B c. Eo values can be calculated only for complete redox reactions, not half reactions. 7) The fact that the reaction above progresses from left to right tells us that: a. The chemicals on the left hand side have a lower potential energy than the chemicals on the right hand side....
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