BACE Exam Questions and Correct Answers

BACE Exam Questions and Correct Answers Match the compound to its corresponding bond type. - ANSWER NaCl - Ionic H2O - Polar Covalent CH4 - Nonpolar Covalent Which of the following should be used to calculate the amount of compound required to make a solution? - ANSWER Molecular Weight Below is a list of the four groups of macromolecules found in living things. Match the macromolecule to its example and associated functions. - ANSWER Carbohydrates - Example: cellulose. Functions: energy storage, receptors, structure of plant cell wall. Lipids - Example: cholesterol. Functions: membrane structure, energy storage. Nucleic acids - Example: RNA. Functions: information storage and transfer. Proteins - Example: enzymes. Functions: structure, receptors and transport. Carbon dioxide as a by-product benefits the brewing and baking industry in a process called fermentation. When microorganisms (usually yeast) undergo fermentation, they obtain their energy by: - ANSWER Anaerobic respiration The enzyme maltase catalyzes the break down of maltose into glucose. A technician added maltase to a solution of maltose to be incubated at 37°C for 20 minutes. Samples were taken from the reaction tube every five minutes, and the glucose and maltose concentrations were measured. No maltose was left in the reaction after 15 minutes. Which of the following graphs represents the change in glucose and maltose concentrations over time? - ANSWER Glucose: The concentration increases as the time increases. Maltose: The concentration decreases as the time decreases. The enzyme maltase catalyzes the break down of maltose into glucose. A technician added maltase to a solution of maltose to be incubated at 37°C. Samples were taken from the reaction tube every five minutes over the course of one hour, to measure the glucose concentration. After an hour, the technician noticed the water bath failed to reach 37°C (it only warmed to 25°C). Which of the following is the most likely outcome of the reaction? - ANSWER The enzyme activity would decrease, yielding the same level of glucose over a longer time period. How does DNA differ from one species to another? - ANSWER The number of genes and non-coding regions