Exam 1- BIOC 385 Questions Answered Correctly Latest Update

Exam 1- BIOC 385 Questions Answered Correctly Latest Update The Biosphere 2 project, in Tucson, Arizona, was an experiment involving a large sealed terrarium with humans and photosynthetic plants living in balance. Why did the project have to be interrupted after only a few months? A. The humans ran out of food. B. Levels of CO2 rose to dangerous levels. C. The plants stopped producing oxygen. D. The rate of photosynthesis was too high. - Answers Levels of CO2 rose to dangerous levels In what location of the cell does the Calvin-Benson cycle occur? thylakoid lumen chloroplast stroma cytoplasm chloroplast grana - Answers chloroplast stroma The difference between an oxidation reaction and a reduction reaction is that oxidation is the ______________ and reduction is the ______________. loss of electrons; gain of electrons gain of electrons; loss of electrons loss of protons; gain of protons gain of protons; loss of electrons - Answers loss of electrons; gain of electrons If the Gibbs free energy change value for a reaction is less than zero, this reaction is _______. exothermic exergonic endothermic endergonic - Answers exergonic Is the net reaction favorable for the following series of coupled reactions and what supports that conclusion? Phosphoenolpyruvate + H2O = Pyruvate + Pi ∆G°' = -62.2 kJ/mol ADP + Pi = ATP + H2O ∆G°' = +30.5 kJ/mol No, ∆G°' > 0 Yes, ∆G°' > 0 No, ∆G°' < 0 Yes, ∆G°' < 0 - Answers Yes, ∆G°' < 0 Flux is defined as the rate at which __________is/are interconverted. metabolites sugars enzymes energy - Answers metabolites Enzyme active sites ___________. always exclude water in catalyzed reactions. are characterized as a pocket or cleft. are nonspecific with regard to substrate binding. can only bind a single substrate at a time. - Answers are characterized as a pocket or cleft Which answer correctly classifies the compound with its relationship to aspartate transcarbamoylase? CTP; allosteric activator ATP; allosteric activator ATP; allosteric inhibitor CTP; substrate - Answers ATP; allosteric activator The following picture is an example of what phenomenon? photooxidation fluorescence electron transfer resonance energy transfer - Answers resonance energy transfer Electrons from plasotocyanin are passed on to cholorophyll P700+ cholorophyll P680+ cytochrome b6f plastaquinone - Answers cholorophyll P700+ What three functional units were included in the experiment demonstrating that Peter Mitchell's proposal was correct in which a proton gradient is responsible for ATP synthesis? reconstituted vesicle; bovine heart muscle; photon energy artificial membrane; bacteriorhodopsin; ATP synthase NADH, FAD, Coenzyme Q