What is the reducing agent (or electron donor) in the following reaction? Pyruvate + NADH +...
27. What is being reduced in the following reaction? Pyruvate + NADH = Lactate + NAD a. oxygen 6. NADH c. NAD d. lactate pyruvate 45. Where do profons accumulate during electron transport in chloroplasts? a. intermembrane space thylakoid space c. stromal space d. matrix e. photosynthetic lacunae
ve the overall reaction ATP + glucose→glucose-6-phosphate + ADP + H. lf the &G" of ATP hydrolysis is /mol, what is AG for the coupled reaction? A. 46 kJ/mo B-18.4 kJ/mol C. -32.2 kJ/mol D. 18.4kJ/mol 26. Which of the following is true about oxidation-reduction reactions? A. B. C. D. During oxidation a compound gains electrons. Every oxidation must be accompanied by a reduction Dehydrogenases typically remove two electrons and two hydrides (H). There are four commonly accessed oxidation states...
In the electron transport chain, what provides the energy to produce the molecule of ATP at the end of the chain? The entry of H+ ions into the intermembrane space of the mitochondrion Oxidation of lactate to produce pyruvate NAD+ being converted to NADH + H+ The return of H+ ions from the intermembrane space of the mitochondrion
1. Which one of the following shows the correct sequence of energy transitions during chemiosmosis? A. NADH → electron acceptors → proton gradient → ATP synthase → ATP B. NADH → NAD+ → FADH2 → electron acceptors → ATP C. carbohydrates → acetyl CoA → CO2 → proton gradient → ATP D. NAD+ → NADH → protons → ADP → ATP E. glucose → pyruvate → acetyl CoA → NADH → ATP 2. Facultative anaerobes: A. prefer carbon dioxide. B....
QUESTION 15 Which of the following is EXERGONIC? 6 CO2 + 6H20 - glucose + O2 fructose 6-phosphate + ATP – fructose 1,6-bisphosphate + ADP (AG = -3.4 kcal/mol) glucose 6-phosphate + ATP – fructose 6-phosphate + ADP (AG = +0.5 kcal/mol) GDP - Pi GTP + H2O QUESTION 17 Fate(s) of pyruvate is(are) Check all that apply. formation of ethyl alcohol by yeasts formation of glucose by gluconeogenesis in liver cells production of ketone bodies formation of lactate under...
As pyruvate is completely broken down in the TCA (Krebs) cycle, some of its energy is A) conserved in the water molecules resulting from reduction of oxygen. B) conserved in the carbon dioxide molecules released by the processes. C) conserved in FAD and NAD+. D) conserved in NADH + H+ and FADH2. E) found in the oxygen used in the electron transport chain.
26. Standard Reduction Potentials The standard reduc- tion potential, E", of any redox pair is defined for the half-cell reaction: Oxidizing agent + n electrons – reducing agent The E' values for the NAD+/NADH and pyruvate/lactate con- jugate redox pairs are -0.32 V and -0.19 V, respectively. (a) Which redox pair has the greater tendency to lose electrons? Explain. (b) Which pair is the stronger oxidizing agent? Explain. (C) Beginning with 1 M concentrations of each reactant and product at...
is required to accept electron 17. At the very end of the electron transport chain in the mitochondria, final electron acceptor. A. carbon dioxide B. ADP C. ATP Synthase Doxygen E. NAD+ 18. Select the correct flow of energy transfer during cellular respiration. A. NADHH gradient glucose → ATP B glucose → NADH H gradient ATP C. glucose H gradient → NADH ATP D. glucose ATPH gradient → NADH 19. If a muscle cell has low levels of oxygen, which...
answer questions 15) An apoenzyme + cofactor(s) - a) Inhibitor b) active site c) substrate d) holoenzyme 16) Aspartate-transcarbamylase is an enveloved in a pathway that may produces molecule called Cytidine triphosphate. Cytidine triphosphate can bind to anot t o this enzyme, rendering the active site nonfunctional. This is an example of a) ATP hydrolysis b) competitive inhibition c) feedback inhibition d) allosteric activation 17) Which of the following is false regarding fermentation? a) fermentation occurs in the absence of...
Which of the following reactions are non spontaneous? A. Fe+2 > e' + Fe+3 B. pyruvate + 2H+ + 2e' > lactate C. ATP > ADP + Pi D. NADH + H+ > 2e' + NAD+ + H+ E. FAD + 2H+ +2e' > FADH2