Multiple Choice
Which of the following represents the complete chemical reaction for the two stages of glycerol metabolism?
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33. The Organic Chemistry of Metabolic Pathways
Catabolism of Fats: Glycerol Metabolism
Multiple Choice
Which of the following outlines the overall pathway of glycerol metabolism?
A
(1) Phosphorylation (2) Decarboxylation (3) Reduction
B
(1) Cleavage of a triacylglycerol (2) Phosphorylation (3) Oxidation
C
(1) Carboxylation (2) Phosphorylation (3) Decarboxylation
D
(1) Oxidation & Decarboxylation (2) Isomerization (3) Cleavage of a triacylglycerol (4) Hydration
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Verified step by step guidance1
Understand that glycerol metabolism involves the conversion of glycerol into a form that can enter glycolysis or gluconeogenesis.
Recognize that the first step in glycerol metabolism is the cleavage of triacylglycerol to release glycerol.
Identify that the next step is the phosphorylation of glycerol to form glycerol-3-phosphate. This is catalyzed by the enzyme glycerol kinase.
Acknowledge that the subsequent step is the oxidation of glycerol-3-phosphate to dihydroxyacetone phosphate (DHAP), which can then enter glycolysis or gluconeogenesis.
Review the options provided and match them with the correct sequence of steps in glycerol metabolism: (1) Cleavage of a triacylglycerol, (2) Phosphorylation, (3) Oxidation.
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