Question

Please explain which option best fits: 

The glycerol backbone of a triglyceride can be metabolized to the following glycolysis intermediate:

		oxaloacetate
		α-ketoglutarate
		ribulose-5-phosphate
		glyceraldehyde-3-phosphate

Answer 1

Connections of carbohydrate, protein, and lipid metabolic pathways

Phosphoenolpyruvate Alanine Glycine Threonine Cysteine Serine Tryptophan Pyruvate 1 Isoleucine Glucose Acetyl CoĀ Z Acetoacetate Leucine Lysine Phenylalanine Tyrosine Tryptophan Oxaloacetate Citrate Asparagine Aspartate Malate Isocitrate Arginine Proline Histidine Glutamine Fumarate a-ketoglutarate Glutamate Tyrosine Phenylalanine Succinate Succinyl COA+ Isoleucine Valine Methionine Threonine

Fats, known more formally as triglycerides, can be broken down into two components that enter the cellular respiration pathways at different stages. A triglyceride is made up of a three-carbon molecule called glycerol, and of three fatty acid tails attached to the glycerol. Glycerol can be converted to glyceraldehyde-3-phosphate, an intermediate of glycolysis, and continue through the remainder of the cellular respiration breakdown pathway.

Fatty acids, on the other hand, must be broken down in a process called beta-oxidation, which takes place in the matrix of the mitochondria. In beta-oxidation, the fatty acid tails are broken down into a series of two-carbon units that combine with coenzyme A, forming acetyl CoA. This acetyl CoA feeds smoothly into the citric acid cycle.

glycerol backbone fatty acid tails beta oxidation glyceraldehyde- 3-phosphate many acetyl coas

Hence, the answer is glyceraldyde 3- phosphate