Ch. 14 Lehninger Biochem Test Bank Questions And Answers 100% Verified A+ Guaranteed

During strenuous exercise, the NADH formed in the glyceraldehyde 3-phosphate dehydrogenase reaction in skeletal muscle must be reoxidized to NAD+ if glycolysis is to continue. The most important reaction involved in the reoxidation of NADH is: A) dihydroxyacetone phosphate -->glycerol 3-phosphate. B) glucose 6-phosphate -->fructose 6-phosphate. C) isocitrate --> -ketoglutarate. D) oxaloacetate --> malate. E) pyruvate --> lactate. {Ans: E}Which one of the following statements about gluconeogenesis 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). {Ans: B}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. {Ans: A}Which of the following statements about the pentose phosphate pathway is incorrect? A) It generates CO2 from C-1 of glucose.