input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An investigator is studying the function of different enzymes in various human cell types. A subset of normal human cells with an elevated intracellular concentration of bisphosphoglycerate mutase is harvested and isolated. Which of the following is most likely to be absent in these cells?   (A) α-ketoglutarate dehydrogenase   (B) Pyruvate kinase   (C) Glutathione reductase   (D) Carbonic anhydrase
output: ['(A) α-ketoglutarate dehydrogenase <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) α-ketoglutarate dehydrogenase  (B) Pyruvate kinase  (C) Glutathione reductase  (D) Carbonic anhydrase <> possible answers', '  An investigator is studying the function of different enzymes in various human cell types. A subset of normal human cells with an elevated intracellular concentration of bisphosphoglycerate mutase is harvested and isolated. Which of the following is most likely to be absent in these cells? <> context']