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18. The image below depicts the beginning processes of DNA replication. What is the function of the two enzymes labeled in the diagram?

35. One possible result of a chromosomal breakage is for a fragment to join a nonhomologous chromosome. What is this alteration called?

13. Five dialysis bags, constructed from a semipermeable membrane that is impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed) and the percent change in mass of each bag was graphed.  Which line in the graph represents the bag that contained a solution isotonic to the 0.6 M solution at the beginning of the experiment?  

3. Which of the following is a correct monomer/polymer pairing?

46. The following diagram is typical of an enzyme-mediated reaction. Which of the following changes in environmental conditions could denature an enzyme, rendering it ineffective?

41. Using the provided graph, match the human digestive enzymes with their optimum pH. 

1. The molecular structures of linoleic acid and palmitic acid, two naturally occurring substances, are shown in the figure. Based on the molecular structures shown in the figure, which molecule is likely to be  solid at room temperature?

11. Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?

29. Glucose and other simple sugars are the only food molecules broken down during the cellular respiration process in eukaryotic cells. 

42. All cellular organisms are capable of performing glycolysis because it does not require membrane-bound organelles.