Answer to Question #231090 in General Chemistry for justine siamunyano

Question

why are these enzymes Complex I, complex II (or succinate dehydrogenase), and 3-phosphoglycerol dehydrogenase not directly involved in the lipid metabolism

Answer 1

Glucose is converted into fructose 1,6 diphosphate, which is cleaved by aldolase into dihydroxyacetone phosphate and glyceraldehyde 3-phosphate; these trioses are interconvertible through the triosa phosphate isomerase activity. Electrons are transferred from NADH when dihydroxyacetone phosphate is reduced to glycerol 3-phosphate by cGPDH; and the former reoxidized to dihydroxyacetone phosphate by mGPDH. This enzyme is bound to an FAD prosthetic group on the outer side of the inner mitochondrial membrane.