Which one of the following statements about gluconeogencsis is false? A) For sta

Question

Which one of the following statements about gluconeogencsis is false? A) For starting materials, it can use carbon skeletons derived from certain amino acids. B) It consists entirely of the reactions of glycolysis, operating in the reverse direction. C) It employs the enzyme glucose 6-phosphatase. D) It is one of the ways that mammals maintain normal blood glucose levels between meals. E) It requires metabolic energy (ATP or GTP). 22. All of the following enzymes involved in the flow of carbon from glucose to lactate (glycolysis) are also involved in the reversal of this flow (gluconeogencsis) except: A) 3-phosphoglycerate kinase. B) aldolase. C) cnolase. D) phosphofructokinase-1. E) phosphoglucoisomcrase. 23. In humans, gluconeogenesis: A) can result in the conversion of protein into blood glucose. B) helps to reduce blood glucose after a carbohydrate-rich meal. C) is activated by the hormone insulin D) is essential in the conversion of fatty acids to glucose. E) requires the enzyme hexokinase. 24. Which of the following statements about the pentose phosphate pathway is correct? A) It generates 36 mol of ATP per mole of glucose consumed. B) It generates 6 moles of CO2 for each mole of glucose consumed C) It is a reductive pathway; it consumes NADH. D) It is present in plants, but not in animals. E) It provides precursors for the synthesis of nucleotides. 25. The metabolic function of the pentose phosphate pathway is: A) act as a source of ADP biosynthesis. B) generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids. C) participate in oxidation-reduction reactions during the formation of H2O. D) provide intermediates for the citric acid cycle. E) synthesize phosphorus pentoxide.

Explanation / Answer

21. B) It consists entirely of the reactions of glycolysis, operating in the reverse direction.

22. D) phosphofructokinase-1.

23. A) can result in the conversion of protein into blood glucose.

24. E) It provides precursors for the synthesis of nucleotides.

25. B) generate NADPH and pentoses for the biosynthesis of fatty acids and nucleic acids.

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