6. Which of the following best describes the cholesterol molecule? A. Amphipathic B. Nonpolar, charged C. Nonpolar, uncharged D. Polar, charged E. Polar, uncharged   7. The anaerobic conversion of 1...

6. Which of the following best describes the cholesterol molecule? A. Amphipathic B. Nonpolar, charged C. Nonpolar, uncharged D. Polar, charged E. Polar, uncharged   7. The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by a net gain of: A. 1 mol of ATP. B. 1 mol of NADH. C. 2 mol of ATP. D. 2 mol of NADH. E. none of the above.   8. In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (∆G'°) of 23.8 kJ/mol. Under what conditions (encountered in a normal cell) will the free-energy change (∆G) be negative, enabling the reaction to proceed to the right? A. If the concentrations of the two products are high relative to that of fructose 1,6-bisphosphate. B. The reaction will not go to the right spontaneously under any conditions because the ∆G'° is positive. C. Under standard conditions, enough energy is released to drive the reaction to the right. D. When there is a high concentration of fructose 1,6-bisphosphate relative to the concentration of products. E. When there is a high concentration of products relative to the concentration of fructose 1,6bisphosphate.   9. 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).   10. The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all of the following except: A. ATP synthesis. B. catalysis by phosphoglycerate kinase. C. oxidation of NADH to NAD+. D. the formation of 1,3-bisphosphoglycerate. E. utilization of Pi.   11. When the linear form of glucose cyclizes, the product is a(n): A. anhydride. B. glycoside. C. hemiacetal. D. lactone. E. oligosaccharide.