Final Exam 1 Questions With Solutions 2024

Which of the following cells is NOT an APC? macrophages dentritic cells mature B cells natural killer cells None of the answers is correct; all of these are APCs. {Ans: natural killer cells}Which of the following treatments is the most effective for controlling microbial growth? 72°C for 15 seconds 63°C for 30 minutes 140°C for 4 seconds {Ans: they are equivalent treatments}A sample of well water is tested for its bacterial content in a plate count assay. A one-milliliter sample of the water is diluted in a 1:10 dilution series. One milliliter of the fourth dilution tube is plated in a pour plate. After incubation, the plate has 83 colonies, indicating that the original water sample contained {Ans: 830,000}Genetic change in bacteria can be brought about by transformation. conjugation. mutation. transduction. All of the answers are correct. {Ans: all of the answers are correct}Yeast infections are caused by Saccharomyces cerevisiae. Aspergillus. Candida albicans. Penicillium. Histoplasma. {Ans: Candida albicans.}Plasma cells will eventually differentiate into memory cells. {Ans: false}