Microbiology Lab Test 1 Questions and Answers 100% Pass

Microbiology Lab Test 1 Questions and Answers 100% Pass What are the 4 steps to putting a microscope away? - 1.) Clean 2.) Lower stage completely 3.) Scanning power objective in position 4.) Tighten silver knob Foods that are made possible by lactic acid fermentation include: - Answer: yogurt, sauerkraut, sour cream, buttermilk, cheeses, kimchi. Foods and beverages made possible by ethanol fermentation include: - Answer: beer, ale, mead, wines, distilled alcoholic beverages, yeast bread. Foods that are made possible by both lactic acid and ethanol fermentation include: - Answer: sourdough bread, kefir In Autoclave, the temperature is: A.) 100 C B.) 112 C C.) 121 C D.) 144 C - Answer: C In autoclave, the psi steam is: 2 | P a g e Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE A.) 5 B.) 10 C.) 15 D.) 20 - Answer: C In autoclave, the amount of minutes it needs to be set for is: A.) 1 B.) 5 C.) 10 D.) 15 - Answer: D The total magnification of the low power objective on a microscope is: A.) 40 (4 x 10) B.) 100 ( 10 X 10) C.) 400 (40 X 10) D.) 1000 (100 X 10) - Answer: B The total magnification of the high power objective on a microscope is: A.) 40 (4 x 10) 3 | P a g e Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE B.) 100 ( 10 X 10) C.) 400 (40 X 10) D.) 1000 (100 X 10) - Answer: C The total magnification of the oil immersion power objective on a microscope is: A.) 40 (4 x 10) B.) 100 ( 10 X 10) C.) 400 (40 X 10) D.) 1000 (100 X 10) - Answer: D The total magnification of the scanning power objective on a microscope is: A.) 40 (4 x 10) B.) 100 ( 10 X 10) C.) 400 (40 X 10) D.) 1000 (100 X 10) - Answer: A Basic dyes are gram ______. - Answer: positive What are the 2 functions of heat fixing? - Answer: Kills vegetative cells (non-endospores) and makes bacteria stick to the slide. After making a smear, the first of four steps to making a gram stain of your smear is: 4 | P a g e Created by Katelyn Whitman © 2025, All Rights Reserved. 100% PASS GUARANTEE A.) Flood smear with 95% ethanol for 1-3 seconds. B.) Flood smear with crystal violet for 1 minute. C.)Flood smear with safranin for 1 minute. D.) Flood smear with Gram's Iodine for 1 minute. - Answer: B After making a smear, the second of four steps to making a gram stain of your smear is: A.) Flood smear with 95% ethanol for 1-3 seconds. B.) Flood smear with crystal violet for 1 minute. C.)Flood smear with safranin for 1 minute. D.) Flood smear with Gram's Iodine for 1 minute. - Answer: D After making a smear, the third of four steps to making a gram stain of your smear is: A.) Flood smear with 95% ethanol for 1-3 seconds. B.) Flood smear with crystal violet for 1 minute. C.)Flood smear with safranin for 1 minute. D.) Flood smear with Gram's Iodine for 1 minute. - Answer: A After making a smear, the fourth of four steps to making a gram stain o