42. Glucose breakdown in certain mammalian and bacterial cells can occur by mechanisms other than classic glycolysis. In most of these, glucose 6-phosphate is oxidized to 6-phosphogluconate, which is then further metabolized by:
(A) an aldolase-type split to form glyceric acid and glyceraldehyde 3-phosphate.
(B) an aldolase-type split to form glycolic acid and erythrose 4-phosphate.
(C) conversion to 1,6-bisphosphogluconate.
(D) decarboxylation to produce keto- and aldopentoses.
(E) oxidation to a six-carbon dicarboxylic acid.