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Micro Test Bank Chapter 3 Exam Questions & Answers
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Micro Test Bank Chapter 3 Exam Questions & Answers Which of the following is NOT equal to 1 mm? A) 0.001 m B) 106 nm C) 0.1 cm D) 100 μm E) 10-3 m - ANSWER-D) 100 um What structure does light pass through after leaving the condenser in a compound light microscope? A) ocular lens B...

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  • June 10, 2023
  • 26
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers

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  • micro test bank chapter 3 exam questions amp answers

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Micro Test Bank Chapter 3 Exam Questions
& Answers
Which of the following is NOT equal to 1 mm?



A) 0.001 m

B) 106 nm

C) 0.1 cm

D) 100 μm

E) 10-3 m - ANSWER-D) 100 um



What structure does light pass through after leaving the condenser in a compound light microscope?



A) ocular lens

B) objective lens

C) specimen

D) illuminator - ANSWER-C) specimen



Which of the following pairs is mismatched?



A) nigrosin - negative stain

B) methylene blue - simple stain

C) acidic dye - capsule stain

D) basic dye - negative stain

E) crystal violet - simple stain - ANSWER-D) basic dye - negative stain



Which of the following places the steps of the Gram stain in the correct order?

,1-Alcohol-acetone

2-Crystal violet

3-Safranin

4-Iodine



A) 1-2-3-4

B) 2-1-4-3

C) 2-4-1-3

D) 4-3-2-1

E) 1-3-2-4 - ANSWER-C) 2-4-1-3



Which of the following pairs is mismatched?



A) alcohol-acetone — decolorizer

B) crystal violet — basic dye

C) safranin — acid dye

D) iodine — mordant

E) carbolfuchsin — basic dye - ANSWER-C) safranin - acid dye



Which of the following is NOT true regarding the acid-fast stain?



A) It is used to identify members of the genus Mycobacterium.

B) Acid-fast cells retain the primary dye after treatment with acid-alcohol.

C) If cells are acid-fast, they are gram-negative.

D) Acid-fast cells appear red in a completed acid-fast stain.

E) Non-acid-fast microbes appear blue in a completed acid-fast stain. - ANSWER-C) If cells are acid-fast,
they are gram negative



The purpose of a mordant in the Gram stain is to

, A) remove the simple stain.

B) make the bacterial cells larger.

C) make the flagella visible.

D) prevent the crystal violet from leaving the cells.

E) make gram-negative cells visible. - ANSWER-D) prevent the crystal violet from leaving the cells



Which of the following places the steps in the correct sequence?



1-Staining

2-Making a smear

3-Fixing



A) 1-2-3

B) 3-2-1

C) 2-3-1

D) 1-3-2

E) The order is unimportant. - ANSWER-C) 2-3-1



The negative stain is used to



A) visualize endospores.

B) determine Gram reaction.

C) determine flagella arrangement.

D) visualize capsules.

E) determine cell size. - ANSWER-E) determine cell size



Simple staining is often necessary to improve contrast in which microscope?

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