BACE Practice Exam Questions Version A

NaCl is a: -nonpolar covalent -ionic -polar covalent - ionic H2O is a: -nonpolar covalent -ionic -polar covalent - polar covalent CH4 is a: -nonpolar covalent -ionic -polar covalent - nonpolar covalent What should be used to calculate the amount of compound required to make a solution? - molecular weight What is an example of a carbohydrate and its associated functions? - Example is cellulose. Functions are energy storage, receptors, structure of plant cell wall What is an example of a lipids and its associated functions? - Example: cholesterol; Functions: membrane, structure, energy storage What is an example of a nucleic acids and its associated functions? - Example is RNA, it functions: information storage and transfer What is an example of a proteins and its associated functions? - Example is enzymes, its functions: structure, receptors, transport True or False A solvent is the dissolved matter in a solution - False When microorganisms (usually yeast) undergo fermentation, they obtain their energy by: - 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. 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? - 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? - The number of genes and non-coding regions What type of DNA (and description) is circular, long DNA containing several thousand genes - Prokaryotic DNA What type of DNA (and description) is cytoplasmic, circular DNA containing only a few genes - Plasmid DNA What type of DNA (and description) is Linear, long pieces of DNA with many thousands of genes, contained within a nucleus - Eukaryotic DNA A structural gene's code is 5' TAC ATG CCC TTA ATC 3', what will the mRNA transcript be? - 3' AUG UAC GGG AAU UAG 5' True or False The three-dimensional structure of a protein is largely determined by the amino acid sequence. - True