cellular respiration.pdf

70 the selective permeability of biological membranes

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70) The selective permeability of biological membranes is dependent on which of the following? A) the lipid bilayer being permeable to primarily small, nonpolar molecules B) the type of transport proteins that are present in the membrane C) the types of carbohydrates on the surface of the membrane D) A and B only E) A, B, and C 71) Where does glycolysis takes place? A) mitochondrial matrix B) mitochondrial intermembrane space C) mitochondrial outer membrane D) cytosol E) mitochondrial inner membrane 72) Motor proteins provide for molecular motion in cells by interacting with what types of cellular structures? A) cellulose fibers in the cell wall B) sites of energy production in cellular respiration C) cytoskeletons D) membrane proteins E) ribosomes 73) Assume a thylakoid is somehow punctured so that the interior of the thylakoid is no longer separated from the stroma. This damage will have the most direct effect on which of the following processes? A) the flow of electrons from photosystem II to photosystem I B) the reduction of NADP + C) the splitting of water D) the synthesis of ATP E) the absorption of light energy by chlorophyll 74) Which of the following is true for all exergonic reactions? A) A net input of energy from the surroundings is required for the reactions to proceed. B) The reaction proceeds with a net release of free energy. C) The reactions are nonspontaneous. D) The products have more total energy than the reactants. E) Some reactants will be converted to products.
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75) Which statement is false? A) When chlorophyll is reduced, it gains electrons. B) Thylakoid membranes contain the photosynthetic pigments. C) The light reactions of photosynthesis provide the energy for the Calvin cycle. D) The O 2 released during photosynthesis comes from water. E) RuBP is produced during cyclic electron flow in the light reactions of photosynthesis. 76) The oxygen consumed during cellular respiration is involved directly in which process or event? A) the oxidation of pyruvate to acetyl CoA B) the citric acid cycle C) accepting electrons at the end of the electron transport chain D) the phosphorylation of ADP to form ATP E) glycolysis 77) Why is ATP an important molecule in metabolism? A) It provides energy coupling between exergonic and endergonic reactions. B) Its terminal phosphate group contains a strong covalent bond that when hydrolyzed releases free energy. C) Its hydrolysis provides an input of free energy for exergonic reactions. D) A and B only E) A, B and C 78) The sodium-potassium pump in animal cells requires cytoplasmic ATP to pump ions across the plasma membrane. When the proteins of the pump are first synthesized in the rough ER, what side of the ER membrane will the ATP binding site be on A) It will be on the side facing the interior of the ER.
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