Which of the following components of the mitochondrial electron transport chain is not integral to the inner mitochondrial membrane (of a typical eukaryotic cell)? the cytochrome c oxidase complex coenzyme Q (ubiquinone) the cytochrome b-c1 complex cytochrome c the cytochrome a-a3 complex
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Which of the following components of the mitochondrial electron transport chain is not integral to the inner mitochondrial membrane (of a typical eukaryotic cell)?
- the cytochrome c oxidase complex
- coenzyme Q (ubiquinone)
- the cytochrome b-c1 complex
- cytochrome c
- the cytochrome a-a3 complex
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- Which of the following components of the mitochondrial electron transport chain is the only one to be considered a peripheral protein? cell biology the cytochrome a-a3 complex the cytochrome c oxidase complex coenzyme Q (ubiquinone) the cytochrome b-c1 complex cytochrome cWhich of the following components of the mitochondrial electron transport chain is the only one to be considered a peripheral protein? the cytochrome a-a3 complex the cytochrome c oxidase complex coenzyme Q (ubiquinone) the cytochrome b-c1 complex cytochrome cWhich of the following is TRUE about cytochrome c protein? As a part of the ETC chain, it changes conformation to allow H+ ions to flow out of the matrix. It is found on the surface of the inner mitochondrial membrane and, therefore, contains start-transfer and/or stop-transfer sequences. With assistance from Bax, it can move out of the mitochondria and into the cytosol. It is considered a symporter because it is involved in electron transport. It is able to puncture holes in the plasma membrane to initiate apoptosis.
- An enzyme that is not attached to any mitochondrial membrane 1-pyruvate decarboxylase 2-succinic dehydrogenase 3-cytochrome complex 4-f0 f1 complexWhich compartment of the eukaryotic mitochondrion is responsible for the formation of NADH, and FADH2, during catabolism of pyruvate into carbon dioxide? the mitochondrial matrix the outer mitochondrial membrane the intermembrane space the inner mitochondrial membrane the thylakoid membrane The complete catabolism of glucose into CO2 and H2O generally yields a smaller amount of ATP in aerobic eukaryotes than in aerobic prokaryotes because the aerobic eukaryotes: generate more molecules of FADH2 during aerobic respiration have transport costs to get NADH into the mitochondrion generate more molecules of NADH during aerobic respiration are able to use pyruvate as a substrate for fermentation always produce ethanol rather than lactic acid as a byproductThe four complexes of the electron transport chain use the energy of electrons stored in reducing agents to create a concentration gradient of protons (H*) across the mitochondrial inner membrane. Give the number of protons pumped into the intermembrane space by each of the four complexes: complex I: complex II: complex III: complex IV:
- Fill in the blanks using the following words/acronyms: protons; Electron Transport Chain; oxygen; inner; Cytochrome c; NADH; ATP synthase; shuttle; ATP (note: the same word/acronym may be used more than one time) Complex I transfers electrons from to Coenzyme Q; and this transfer leads to the extrusion of from the mitochondrial matrix to the outside face of the mitochondrial membrane. Complex II allows the transfer of electrons from succinate to Coenzyme Q. Coenzyme Q is an electron which transfers electrons to Complex III. Electrons transfer from Complex III is associated with translocation. These electrons are then accepted by ; which transfers them to Complex IV. are also translocated at the level of Complex IV during electrons transfer; allowing the reduction of the final electron acceptor of the which is . ll the translocated are then channeled through the pore of the ; providing the driving force for release from the Enzyme complex.Which complex of the mitochondrial electron transport chain is the only one able to accept electrons directly from FADH2? NADH dehydrogenase (complex I) cytochrome b-c1 (complex III) cytochrome c oxidase (complex IV) the ATP synthase complex FADH2 dehydrogenase (complex II) The above reaction (FADH2 donating its electrons to the electron transport chain) takes place in which of the following eukaryotic cell locations? the mitochondrial matrix the thylakoid membrane of chloroplasts the chloroplast stroma the inner mitochondrial membrane the cytoplasmIn order to pass the outer mitochondrial membrane a fatty acid Reacts with carnitine Is activated with coenzyme A Is activated with coenzyme Q Is oxidized
- Cyanide is an inhibitor of Complex IV of the electron transport chain, i.e., it inhibits the reduction of oxygen to water. Dinitrophenol is a drug that collapses the H+ gradient across the inner mitochondrial membrane. You are given 2 bottles labeled “A” and “B”. One of them has cyanide and the other has dinitrophenol. You are tasked with identifying which of A or B is cyanide and which one is dinitrophenol. You are provided with the following items: A suspension of live, functioning mitochondria A pH-sensitive dye that can permeate both mitochondrial membranes (inner and outer and is red at low pH and blue at high pH. First, what does it mean to say “collapse the H+ gradient”? Make a flow-chart to show how you would do an experiment with the items provided to identify which bottle is cyanide and which is dinitrophenol.Cyanide is an inhibitor of Complex IV of the electron transport chain, i.e., it inhibits the reduction of oxygen to water. Dinitrophenol is a drug that collapses the H+ gradient across the inner mitochondrial membrane. You are given 2 bottles labeled “A” and “B”. One of them has cyanide and the other has dinitrophenol. You are tasked with identifying which of A or B is cyanide and which one is dinitrophenol. You are provided with the following items: A suspension of live, functioning mitochondria A pH-sensitive dye that can permeate both mitochondrial membranes (inner and outer and is red at low pH and blue at high pH. Make a flow-chart to show how you would do an experiment with the items provided to identify which bottle is cyanide and which is dinitrophenol.The P/O ratio of a compound refers to the number of ATP produced when two electrons from the said compound reduce oxygen to produce 1 molecule of water. Assuming 4 H+ are needed per ATP synthesized, what is the P/O ratio of the following compounds: NADH FADH2 Ubiquinol Tetramethyl-p-phenylenediamine – this compound donates 2 electrons directly to complex IV of the mitochondrial ETC.