20) Which of the following produces the most ATT when glucose (Csh120) is comple
ID: 213701 • Letter: 2
Question
20) Which of the following produces the most ATT when glucose (Csh120) is completely oxidized 20) to carbon dioxide (CO2) and water? A) oxidation of pyruvate to acetyl CoA B) fermentation C) oxidative phosphorylation (chemiosmosis) D) glycolysis E) citric acid cycle 21) 21) Which of the following statements describes the results of this reaction? C&H120;%+602-6 CO2+6 H20 Energy A) Oz is reduced and Co2 is oxidized B) CoH120% is oxidized and Oz is reduced C) CeH120% is reduced and COz is axidized. D) CO2 is reduced and O2 is oxidized. E) 02 is oxidized and H20 is reduced. 22) 22) The light reactions of photosynthesis supply the Calvin cycle with A) ATP and NADPH B) CO2 and ATP C) sugar and 02 D) light energy E) H2O and NADPH, 23) 23) Where does the Calvin cycle take place? A) outer membrane of the chloroplast B) interior of the thylakoid (thylakoid space) C) thylakoid membrane D) stroma of the chloroplast E) cytoplasm surrounding the chloroplast 24) Which process is most directly driven by light energy? 24) A) reduction of NADPt molecules B) carbon fixation in the stroma C) ATP synthesis D) creation of a plH gradient by pumping protoens across the thylakoid membrane E) removal of electrons from chlorophyll molecules 25) The immediate energy source that drives ATP synthesis by ATP synthase during oxidative 25) phosphorylation is A) the Ht concentration gradient across the inner mitochondrial membrane. B) the affinity of oxygen for electrons. C) the oxidation of glucose and other organic compounds D) the transfer of phosphate to ADP E) the flow of electrons down the electron transport chain.Explanation / Answer
20. Oxidative phosphorylation produces the most ATP when glucose (C6H12O6) is completely oxidised to carbon dioxide (CO2) and water. 38 mole ATP are produced by oxidation of 1 mole glucose in presence of oxygen. So, option C is the correct choice here.
21. Oxidation is addition of Oxygen or removal of hydrogen from a molecule.
Reduction is addition of hydrogen or removal of oxygen from a molecule.
If we look at the reaction, we can easily understand that from glucose hydrogen are removed and water is formed by addition of hydrogen to the oxygen. So, we can easily say that glucose (C6H12O6) is oxidised and oxygen (O2) is reduced. Option B is correct answer here.
22. ATP and NADPH are produced in light reaction stage. Both are act as energy sources. They are supplied to the Calvin cycle as energy source. So, option A is the right choice here.
23. The Calvin cycle takes Place in stroma of chloroplast. Option D is the right choice here.
24. The photons of light are absobed by the chlorophyll molecules and they become activated. So, removal of electrons from chlorophyll molecules is most directly driven by light energy. Option E is the correct choice here.
25. The immediate energy source that driven ATP synthesis by ATP synthase during oxidative phosphorylation is the H+ concentration gradient across the inner mitochondrial membrane. This concentration gradient rotate the head of the enzyme and and make ADP phosphorylated to ATP. So, option A is the correct choice here.
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