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Example Questions
Example Question #121 : Cellular Respiration
During pyruvate decarboxylation reaction, pyruvate is converted to _______________ compound, through a reaction called ______________ .
acetyl CoA; reductive decarboxylation
ATP; decomposition
NADH; oxidative decarboxylation
acetyl CoA; oxidative decarboxylation
acetyl CoA; oxidative decarboxylation
Pyruvate decarboxylation is an oxidative decarboxylation reaction, or an oxidation reaction where a carboxylate group is removed. This reaction converts pyruvate which was produced through glycolysis to acetyl CoA to be used in the Citric Acid Cycle.
Example Question #122 : Cellular Respiration
Which enzyme complex catalyzes the pyruvate decarboxylation reaction?
pyruvate oxidase
pyruvate reductase
acetyl dehydrogenase
pyruvate dehydrogenase complex
pyruvate dehydrogenase complex
The pyruvate dehydrogenase complex is an enzyme complex that consists of 3 enzymes, which work together to catalyze the pyruvate decarboxylation reaction, where pyruvate is converted to acetyl CoA.
Example Question #123 : Cellular Respiration
Where does the pyruvate decarboxylation reaction occur?
Cytosol
Cristae
Outer mitochondrial membrane
Mitochondrial matrix
Mitochondrial matrix
Pyruvate decarboxylation occurs in the mitochondrial matrix. The acetyl CoA produced from the pyruvate decarboxylation reaction will undergo the Citric Acid cycle also in the mitochondrial matrix.
Example Question #124 : Cellular Respiration
For each glucose molecule that undergoes glycolysis, how many acetyl CoA molecules are produced at the end of pyruvate decarboxylation?
2
1
4
32
2
During glycolysis, for each molecule of glucose, two molecules of pyruvate are produced ( glucose+ NAD+ + 2 ADP + 2Pi-> 2 pyruvate+ 2 ATP + 2NADH+. These 2 molecules of pyruvate then undergo the pyruvate decarboxylation reaction: 2(pyruvate+ CoA-SH+ NAD+ -> NADH+ CO2+ acetyl CoA).
Example Question #125 : Cellular Respiration
During the pyruvate decarboxylation reaction, acetyl CoA is produced through which type of bond linking an acetyl group to coenzyme A?
acetylase bond
hydrogen bond
ionic bond
thioester bond
thioester bond
During the pyruvate decarboxylation reaction , a thioester bond links the acetyl group of pyruvate with coenzyme A to produce acetyl CoA.
Example Question #126 : Cellular Respiration
Which is not a product of pyruvate decarboxylation reaction?
acetyl
The pyruvate decarboxylation reaction is pyruvate+ CoA-SH+ NAD+ -> NADH+ CO2+ acetyl CoA.
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