brock biology of microorganisms 15th test bank solved questions with correct answers

Bloom’s Taxonomy: 1-2: Remembering/Understanding Chapter Section: 5.3 • Optical density and viable cell concentration are LEAST proportional toeach other during the • A) lag phase. • B) exponential growth phase. • C) stationary phase. • D) death phase. Answer: D Bloom’s Taxonomy: 3-4: Applying/Analyzing Chapter Section: 5.8 • When attempting to determine viable cell counts of a heatsensitivebacterial isolate, which cell counting method should be avoided? • A) spread-plate method • B) pour-plate method • C) live staining and direct counting with a microscope • D) both spread- and pour-plate methods Answer: B Bloom’s Taxonomy: 3-4: Applying/Analyzing Chapter Section: 5.7 • Bacteria that are able to grow in humans and cause disease would beclassified as • A) psychrophiles. • B) mesophiles. • C) thermophiles. • D) hyperthermophiles. Answer: B Bloom’s Taxonomy: 3-4: Applying/Analyzing Chapter Section: 5.9 • An agar plate for counting colonies and maximizing statistical validityshould ideally contain • A) 1 to 100 colonies. • B) 50 to 100 colonies. • C) 30 to 300 colonies. • D) 100 to 1000 colonies. Answer: C