11. Which of the following terms describes ATP synthesis in mitochondria?
(A) substrate-level phosphorylation
(B) oxidative phosphorylation
(C) photophosphorylation
(D) None of them

12. Which of the following modifications is likely to happen to the mRNA in a eukaryotic cell? (A) removal of intervening sequences (introns) (B) capping of the 5' end (C) addition of a poly-A tail to the 3' end (D) All of the above occur in eukaryotic cells (E) None of the above occur in eukaryotic cells

13. Which of the following is correct concerning the differences between hemoglobin and myoglobin? (A) Both hemoglobin and myoglobin are tetrameric proteins. (B) Hemoglobin exhibits cooperative binding of O₂ while myoglobin does not. (C) Hemoglobin exhibits a hyperbolic O₂ saturation curve while myoglobin exhibits a sigmoid shaped curve. (D) Hemoglobin exhibits a higher degree of O₂ saturation at all physiologically relevant partial pressures of O₂ than does myoglobin.

14. Given the rate law, rate = k[A][B], the overall reaction order is (A) zero (B) one (C) two (D) cannot be determined

15. What does amphipathic mean? (A) having both positive and negative charges (B) having both acid and base properties (C) having both hydrophilic and hydrophobic regions (D) having two stereoisomers

16. The reactions of glycolysis occur in this eukaryotic cell compartment (A) Mitochondrion (B) Nucleus (C) Cytoplasm (D) Both cytoplasm and mitochondria

17. The primer for in vivo DNA replication is (A) A short piece of RNA (B) A nick made in the DNA template (C) The 3' hydroxyl of the preceding Okazaki fragment (D) A primer is not always required for DNA replication.

18. The linkage between the glucose residues in amylopectin and glycogen is (A) For the main chain α(1→4) and β(1→4) for the branches (B) For the main chain α(1→6) and α(1→4) for the branches (C) For the main chain α(1→4) and α (1→6) for the branches (D) For the main chain β(1→4) and β(1→6) for the branches

19. Which of the following enzymes is not a control point of the citric acid cycle? (A) aconitase (B) isocitrate dehydrogenase (C) citrate synthase (D) the α-ketoglutarate dehydrogenase complex

20. Which of the following monosaccharides is a ketose? (A) glucose (B) galactose (C) mannose (D) fructose

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