13) 13) Synthesis of ATP by the chemiosmotic mechanism occurs during B) respirat

Question

13) 13) Synthesis of ATP by the chemiosmotic mechanism occurs during B) respiration C) neither photosynthesis nor respiration D) both photosyndhesis and respiration E) photosynthesis 14) 14) ts cellular repiration energy released by the electron transport chain is used to pump H ions into which location? A) mitochondrialmatrix B) mitochondrial outer membrane C) mibochondrial inner embrane D) mibochondrial intermembrane space E) cytosol 15) In a plant cell, where are the ATP syethase complexes locatedt A) thylakoid membrane B) plasma membrane C) ineer mitochondrial membeane D) A and C E)A,B,and C 16) Which metabolic pathway is common to both Sermentation and cellular respiration of a ghacoe 16) molecule? A) slycolysis B) reduction of pyruvate to lactaso the electron transport chain D) synthesis of acetyl CoA from pyruvate E) the cieric acid cyde 17 17) The final electron acceptor of the electron traneport chain that functions in aerobic oxidative A) ADP B) pyruvate. ater DI oxygim. E) NAD* 18) Which of the following are products of the light reactions of photosyndhersis that are utilized in o 1)_ the Calvin cycle? A) H20 and O2 B) 002 and glucose C) ATP and NADPH D) ADI, Oy, and NADP E) electrons and H 91 19) Which of the following sequences correctly represents the flow of electrons during A) NADPH-O2-CO2 B) NADPH chlorophyl-Calvin cycle C) H2o NADPH Calvin cydle D) Hzo-photosystem 1-photosystem II E) NADPH-electron transpeet chuin-O2

Explanation / Answer

Answer for question number 13 : The correct option is D ( Both in photosynthesis and respiration)

Explanation : According to Peter Mitchell’s chemiosmatic hypothesis, Flow of electrons during electron transport chain generates both Chemical gradient (difference in solute concentration) and an electrical gradient (difference in charge across) across the inner mitochondrial membrane by pumping protons in to the perimitochondrial space. This separation of charge across the inner mitochondrial membrane in turn generates proton motive force (PMF). This proton-motive force drives the protons from perimitochondrial space back into the matrix through a proton pore associated with ATP synthase/F0-F1 complex resulting in the synthesis of ATP using ADP and Pi in the mitochondrial matrix.

Additional information: Since mitochondrial inner membrane is impermeable to protons, they always move passively into the matrix through ATP synthase complex associated with ATP generation.

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