<prompt> Essential fructosuria is due to the deficiency of which enzyme?Aldolase AAldolase BFructokinaseGlucokinase  <response>: Ans. c FructokinaseRef: Harper, pg. 169Deficiencies in the enzymes of fructose and galactose metabolism lead to essential fructosuria and galactosemiasLack of hepatic fructokinase causes essential fructosuria, and absence of hepatic aldolase B, which cleaves fructose 1-phosphate,leads to hereditary fructose intoleranceMetabolism of fructose. Aldolase A is found in all tissues, whereas aldolase B is the predominant form in liver. not found in liver 