Cyanide toxicity results from its ability to inhibit cytochrome oxidase c, part of the ETC of cell respiration. What effect(s) might you expect from cyanide poisoning?U a. Intracellular accumulation of NADH.Ob.Rapid depletion of oxygen.Increased amounts of oxidative phosphorylation.Od.Inhibition of PFK would occur.U e. Decreased production of ATP

PKF stands for Phosphofructokinase and is an enzyme which is crucial in glycolysis . It helps by…

Cyanide toxicity results from its ability to inhibit cytochrome oxidase c, part of the ETC of cell respiration. What effect(s) might you expect from cyanide poisoning? O a. Intracellular accumulation of NADH. Ob. Rapid depletion of oxygen. U c. Increased amounts of oxidative phosphorylation. O d. Inhibition of PFK would occur. Decreased production of ATP

Cyanide toxicity results from its ability to inhibit cytochrome oxidase c, part of the ETC of cell respiration. What effect(s) might you expect from cyanide poisoning? O a. Intracellular accumulation of NADH. Ob. Rapid depletion of oxygen. U c. Increased amounts of oxidative phosphorylation. O d. Inhibition of PFK would occur. Decreased production of ATP

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter21: Photosynthesis

Section: Chapter Questions

Problem 5P: The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If...

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The Relative Efficiency of ATP Synthesis in Noncyclic versus Cyclic Photophosphorylation If noncyclic photosynthetic electron transport leads to the translocation of 7 H+/2e- and cyclic photosynthetic electron transport leads to the translocation of 2 H+/e-, what is the relative photosynthetic efficiency of ATP synthesis (expressed as the number of photons absorbed per ATP synthesized) for noncyclic versus cyclic photophosphorylation? (Assume that the CF1CF0-ATP synthase yields 3 ATP/14 H+.)
Which of these is associated with production of ATP during glycolysis? (Select all that apply) a) Conversion of 1,3-BPG to 3PG b) Conversion of 1,3-BPG to 2,3-BPG c) Conversion of PEP to pyruvate d) Conversion of 2,3-BPG to 2PG e) Phosphorylation of glucose
Which of the following stimulates the conversion of pyruvate to acetyl-CoA? a) Activation of pyruvate dehydrogenase kinase b) A decrease in the ratio of NAD+/NADH c) Bothaandb d) Neither a nor b
Which of the following statements about FAD is FALSE? a. More ATP is produced from the high-energy electrons carried by FADH2 than from those of NADH b. Electrons stored in FADH2 are used in oxidative phosphorylation c. FADH2 has more chemical potential energy than FAD d. FADH2 enters the electron transport chain at Complex 2 e. FAD is reduced into FADH2 during the Citric Acid Cycle
Each acetyl CoA that enters in the citric acid cycle, 2 carbon dioxide molecules are released in reactions which are coupled with the production of NADH molecules from reduction of NAD+ molecules and FADH2 is alse released by reduction of FAD+. NADH and FADH2, pass their electrons to the electron transport chain, turning back into NAD+ and FAD+ Explain further
A key enzyme of the Citric Acid Cycle is isocitrate dehydrogenase. It catalyzes the conversion of isocitrate to alpha ketoglutarate. Given your understanding of the Citric Acid Cycle, how is the activity of isocitrate dehydrogenase likely regulated? A. It is activated when fermentation starts. B. It is activated when the levels of NADH are low relative to NAD+. C. It is activated when levels of ATP are high relative to ADP. D. It is inhibited by high levels of pyruvate.
This is the question: Ethanol metabolism has been part of the human diet for centuries. Ethanol cannot be excreted and must be metabolized by the liver using the enzyme alcohol dehydrogenase in a two step reaction: Excess consumption of ethanol leads to the accumulation of NADH. What effect would a high concentration of NADH have on metabolic pathways and consequently the body. Choose as least two pathways to describe the effect.
If the enzyme that catalyzed the reaction that converts pyruvate to acetyl-CoA and carbon dioxide is inhibited: a. the production of ATP would decreases but the production of electron carriers would be unaffected b. the concentration of pyruvate would decrease c. the citric acid cycle will not be affected d. ATP production in the electron transport chain/oxidative phosphorylation will increase e. the concentration of acetyl Co A would decrease
___ molecules of ATP are ultimately formed per every acetyl-CoA that enters the citric acid cycle and the remaining ATP molecules are generated via the ___ of NADH and FADH2. A) Nine; oxidation B) Ten; reduction C) Ten; oxidation D)Nine; reduction
The two electron carriers involved in the redox reactions of cellular respiration are NAD+ and FAD. When a molecule of FAD is converted to FADH2, it has been A) reduced B) dehydrogenated C) oxidized
The consumption of acetyl-CoA by the citric acid cycle is DECREASED under which condition? A. the concentration of NAD+ being high B. the concentration of oxaloacetate being high C. NADH being rapidly re-oxidized via the electron-transport chain D. the mitochondrial ATP synthase being inactive E. the concentration of both NAD+ and oxaloacetate being high
Why does FAHD2 oxidation give 1.5 ATP while NADH oxidation gives 2.5 ATP? Explain this in relation to ETC.