What does the pyruvate dehydrogenase complex do? Choose one: It produces pyruvate in the cytosol. It converts pyruvate into acetyl CoA in the mitochondrial matrix. It regenerates NAD+ in the mitochondrial matrix. O It converts pyruvate into acetyl CoA in the cytosol. It completes the oxidation of pyruvate to CO2 in the mitochondrial matrix.

What does the pyruvate dehydrogenase complex do? Choose one: It produces pyruvate in the cytosol. It converts pyruvate into acetyl CoA in the mitochondrial matrix. It regenerates NAD+ in the mitochondrial matrix. O It converts pyruvate into acetyl CoA in the cytosol. It completes the oxidation of pyruvate to CO2 in the mitochondrial matrix.

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter19: The Tricarboxylic Acid Cycle

Section: Chapter Questions

Problem 22P: Study Figure 19.18 and decide which of the following statements is false. Pyruvate dehydrogenase is...

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Taking into consideration glycolysis, the pyruvate dehydrogenase complex and the citric acid cycle, how many NAD+ molecules are reduced from a single molecule of dihydroxyacetone phosphate? 4 NAD+ are reduced 5 NAD+ are reduced 8 NAD+ are reduced 10 NAD+ are reduced None of the above answers are correct
Before pyruvate enters the citric acid cycle, it is decarboxylated, oxidized, and combined with coenzyme A, forming acetyl CoA, carbon dioxide, and one molecule of (a) NADH (b) FADH2 (c) ATP (d) ADP (e) C6H12O6
Which of the following is the third step of Citric Acid Cycle? Select one: a. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH b. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH e. Succinate is oxidized to become fumarate forming FADH2 f. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) g. Citrate is rearranged to become Isocitrate h. Malate is oxidized to become oxaloacetate forming NADH i. Fumarate is combined with water to become Malate
You know that during oxidative phosphorylation, 1 NADH creates 2.5 ATP and 1 FADH2 creates 1.5 ATP. From this information, how many total ATP molecules will be produced from the complete oxidation of pyruvate?
Which of the following is the second step of Citric Acid Cycle? Select one: a. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH b. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH c. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH d. Malate is oxidized to become oxaloacetate forming NADH e. Fumarate is combined with water to become Malate f. Citrate is rearranged to become Isocitrate g. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Succinate is oxidized to become fumarate forming FADH2
What are the three names for the metabolic cycle that occurs in the matrix of the mitochondria? This pathway receives acetyl-CoA, combines it to other metabolites, steals its available electrons, and releases carbon in its most oxidized form.
___ 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
Which of the following pair of substances are products of the citric acid cycle? a) Acetyl CoA and NADH b) Acetyl CoA and CO2 c) CoA-SH and FADH2 d) Citrate and CO2
Which of the following is the sixth step of Citric Acid Cycle? Select one: a. Succinate is oxidized to become fumarate forming FADH2 b. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) e. Malate is oxidized to become oxaloacetate forming NADH f. Fumarate is combined with water to become Malate g. Citrate is rearranged to become Isocitrate h. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide i. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH
Which of the following steps DO NOT occur in pyruvate oxidation? A. Addition of Co-A B. Oxidation of NAD+ C. Production of COz D. Oxidation of Pyruvate
What is the first cofactor to accept electrons from pyruvate in the Pyruvate dehydrogenase complex? Thymine pyroposphate lipoyllysine FAD NAD⁺
During the citric acid (Krebs) cycle, the energy from acetyl-CoA is captured in which molecules? CHOOSE ALL THAT APPLY. A)Hydrogen Atoms B)Pyruvate C)ATP D)Carbon Dioxide E)Reduced electron carriers