How do the NADH and FADH2 molecules produced from B-oxidation lead to the production of ATP
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CHOOSE THE CORRECT LETTER
How do the NADH and FADH2 molecules produced from B-oxidation lead to the production of ATP?
A. oxidative phosphorylation through the electron transport chain
B. substrate phosphorylation through the Kreb's cycle
C. they will follow one of the shuttle mechanisms present in the cell
D. they are coupled to a redox reactino
Step by step
Solved in 2 steps
- Match the term with the best description. _____ mitochondrial matrix a. needed for glycolysis _____ pyruvate b. inner space _____ NAD+ c. makes many ATP _____ mitochondrion d. product of glycolysis _____ NADH e. reduced coenzyme _____ anaerobic f. no oxygen requiredCHOOSE THE CORRECT LETTER How does the acetyl-CoA product of a cycle of B-oxidation lead to the DIRECT production of ATP?A.through substrate phosphorylation in the Kreb's cycleB. they are coupled to a redox reactionC. oxidative phosphorylation through the electron transport chainD. they will follow one of the shuttle mechanisms present in the cellwhich of the following woudl decrease the number of atp molecules generated per nadh molecule in the electron transport chain? a. increasing the energy of the electrons nadh transfer to complex I b. reducing the number of protons required by ATP synthase to produce an ATP moelcule c. having nadh transfer its elections to complex III instead of complex I d. increasing the amount of oxygen available to the cell
- The immediate energy source that drives ATPsynthesis by ATP synthase during oxidativephosphorylation is the(A) oxidation of glucose and other organiccompounds.(B) flow of electrons down the electron transportchain.(C) H+concentration gradient across the membrane holdingATP synthase.(D) transfer of phosphate to ADPShow how the reactions of the electron transport chain differ from those in Question 3 when FADH2 is the starting point for electron transport. Show how the reactions that liberate enough energy to drive the phosphorylation of ADP differ from the pathway when NADH is the starting pointWhy is it important to regenerate NAD+ during fermentation?a. It helps maintain the reactions of glycolysis.b. So that it can transfer an electron to the electron transport chainc. To maintain the concentration of pyruvate in a celld. To produce alcohol or lactic acid for the cell
- What causes the transfer of electrons through an electron transport chain? a. The initial "push" from NADH b. The increasing electronegatively of the carries c. protons moving across the membrane d. electron motive foceFreshly prepared mitochondria were incubated with β-hydroxybutyrate, oxidized cytochrome c, ADP, Pi, and cyanide. β-hydroxybutyrate is oxidized by an NAD+-dependent dehydrogenase. The experimenter measured the rate of oxidation of β-hydroxybutyrate andthe rate of formation of ATP.(a) Indicate the probable flow of electrons in this system.(b) How many moles of ATP would you expect to be formed per mole ofβ-hydroxybutyrate oxidized in this system?(c) Why is b-hydroxybutyrate added rather than NADH?(d) What is the function of the cyanide?(e) Write a balanced equation for the overall reaction occurring in thissystem (electron transport and ATP synthesis). (f) Calculate the net standard free energy change (ΔG°') in this system,using E'0 values from Table 14.1 and a ΔG°' value for ATP hydrolysisof -32.2 kJ/mol.Long explanations are NOT NEEDED. Answer only d and e. ATP accounting. Consider 1 molecule of the sucrose (monomeric units: glucose and fructose) that will undergo complete oxidation. -Number of pyruvate molecules after glycolysis is 4.-Net ATP produced in glycolysis only (via substrate-level phosphorylation) is 2.-Number of NADH produced using the pyruvate dehydrogenase complex reaction is 1. Now find:d. Number of NADH and FADH2 produced from Krebs cycle.e. Net ATP produced (complete oxidation via Malate aspartate shuttle).
- NADH dehydrogenase 3 gene codes for a protein in the electron transport chain. Suppose that this protein is exposed to extremely high heat. What is likely to happen to this protein and why? (Be specific as to what will happen and why it will happen. Don't just say it will stop working; explain why.)which statement is false? a. Electrons do not usually flow through the electron-transport chain to oxygen unless ADP is simultaneously phosphorylated to ATP. b. Oxidative phosphorylation requires a supply of NADH or other source of electrons at high potential, oxygen, and ADP. c. The rate of oxygen consumption by mitochondria increases markedly when ADP is added and then returns to its initial value when the added ADP has been converted into ATP. d. The most important factor in determining the rate of oxidative phosphorylation is the level of ADP and inorganic phosphate.Choose the correct ans Both NADH and FADH2 enter the electron transport chain via the Complex I.a Trueb False
