Which of the following reactions is feasible at pH 7 ? And, why? FAD + NADH + H+ FADH2 + NAD+ FADH2 + NAD+ FAD+ NADH + H+
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- Balance the following net reaction that occurs during oxidative phosphorylation. Use the smallest whole integers possible for the reaction stoichiometry. NADH+ FADH₂ + ADP+ 0₂+H+PO, ¹ NAD+FAD+ ATP+ +H₂OIndicate whether each of the following changes represents oxidation or reduction. Write: O = for oxidation ; R= for reduction Example: cyt ci (Fet) → cyt c1 (Fe2+) Answer: R Blank #1: COQH2 → CoQ Blank #2: NAD+ - NADH Blank #3: FMN → FMNH2 Blank # 4: FADH2 FAD Blank #5: Fe(III) SP → Fe(II) SP Blank # 1 Blank # 2U Select all of the following half reactions that require energy (work) to proceed as written. NAD+ + 2HNADH + H+ glucose + inorganic phosphate glucose-6-phosphate + H₂O › DETAILS O=d-0 OH NADH+H NAD+ + 2H OH o-p-o-C-CH3 + H2O -0-8-CH3 PREVIOUS ANSWERS ATP+ H₂O ADP + P₁ H قمر H (not balanced) (not balanced) O 0-4-OH + HO-CH₂ 0 x
- Under standard conditions, will the following reaction proceed spontaneously as written? Fumarate + NADH + H+⇌ succinate + NAD+Which of the following statements best explains why the activity of ATP-citrate lyase and malic enzyme are often paired together? The use of ATP by ATP-citrate lyase means that NADH needs to be regenerated cytosolically so that more ATP can be generated via shuttle systems and replace the ATP used by ATP-citrate lyase ATP-citrate lyase produces ATP and malic enzyme produces NADPH, both needed in the fatty acid biosynthetic pathway The activity of ATP-citrate lyase and malic enzyme never are correlated, they always function in different realms of metabolism The generation of acetyl CoA is a substrate for fatty acid synthesis in the cytosol and NADPH is generated as the anabolic electron carrier7. Glucose-6-phosphate dehydrogenase catalyzes the reaction shown below. Kinetic data for the enzyme isolated from the thermophilic bacterium T. maritima are presented in the following table. CH₂OPO H но CH₂OPO OH H H OH Н OH Glucose-6-phosphate Substrate NADP+ NAD+ NADP+ Glucose-6-phosphate NADPH + H+ glucose-6- phosphate dehydrogenase H 12.0 НО H OH H Η OH 6-Phosphoglucono-8-lactone KM (mM) Vmax (Umg-¹) 0.15 20 0.03 20 6 a. NADPH inhibits glucose-6-phosphate dehydrogenase. What kind of inhibitor is NADPH? b. How are the values of KM and Vmax likely to differ from those listed in the table if NADPH is present? c. Does glucose-6-phosphate dehydrogenase prefer NAD+ or NADP+ as a cofactor?
- About the process of industrial production of ethanol by the yeast Saccharomyces cerevisiae, mark the correct alternatives: (a) the cells must be cultured in anaerobic conditions to activate the metabolic pathway of ethanol production (b). the presence of oxygen is required to allow regeneration of the NAD+ cofactor (c). good oxygenation of the medium is important to favor the formation of greater amounts of ATP (d).the production of ethanol is always accompanied by the formation of glycerol (e). the sugar present in the culture medium is completely oxidized to CO2 and waterIn several species of bacteria, GAPDH activity is controlled by the NADH/NAD+ ratio. Does the activity of GAPDH increase or decrease when the NADH/NAD+ ratio increases? Explain. Assume that only the forward direction of the reaction is relevant. a) The activity of GAPDH increases when the NADH/NAD+ ratio increases. b) The activity of GAPDH decreases when the NADH/NAD+ ratio increases.Write out the full redox reaction that happens when both of these reactions are added to the same reaction where there is 1M concentrations of each reactant and products, pH7, and temeprature is 290K. Identify which compounds will be reduced and which compounds will be oxidized. redox reaction 1: Pyruvate¯ + 2H+ + 2e¯ → lactate¯ E'o(V) = -0.185 redox reaction 2: NAD+ + H+ + 2e¯ → NADH E'o(V) = -0.320
- The photosynthetic process used by the green sulfur bacteria, under anaerobic conditions, is best represented by which of the following balanced equations? cell bio 6CO2 + 12H2S C6H12O6 + 6S2 + 6H2O C6H12O6 + C6H12O6 C12H22O11 + H2O 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O C12H22O11 + H2O C6H12O6 + C6H12O6 C6H12O6 + 6O2 + 6H2O 6CO2 + 12H2OThe enzyme that catalyzes reaction below can be classified as: CoO COO NAD+ NADH + H* Но- | malate -C- H-Ć- dehydrogenase Охaloacetate Malate isomerase lyase hydrolase oxidoreductase ligase transferaseComplete the following reactions: NADH, H+ oxidoreductase O2 oxidoreductase