Question 19 of 20 Incorrect Incorrect Sapling Learning macmillan learning e reve

Question

Question 19 of 20 Incorrect Incorrect Sapling Learning macmillan learning e reversible interconversion reactions of the pentose phosphate pathway can operate either to convert pentoses to hexoses, when operating in an oxidative mode to generate NADPH, or to convert hexoses to pentoses, when operating in a non-oxidative mode to generate pentoses for nucleic acid synthesis Two key enzymes in these interconversion reactions are transaldolase and transketolase. ldentify the products formed from the seven-carbon sugar sedoheptulose-7-phosphate and glyceraldehyde-3-phosphate with each of these enzvmes sedoheptulose- 7-phosphate glyceraldehyde 3-phosphate CH2-OH OH O erythrose-4 phosphate+ fructose-6-phosphate ribose-5-phosphate + xylulose-5- phosphate Transketolase T ransaldolase neorret It would require transfer of a three-carbon unit to produce these products. Transketolase catalyzes the transfer of a two carbon unit OH C

Explanation / Answer

Transaldolase products are erythrose-4-phosphate + F6P

Transketolase products are ribose-5-phosphate + xylulose-5-phosphate

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