Microbiology Lab Practical – Final Exam 2025 UPDATE/PRACTICE QUESTIONS AND
CORRECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADED A+!!!
bright field microscopy - (answer)light rays pass directly to the eye without being deflected in the
condenser
microscope arm - (answer)the portion of the microscope that connects the lenses to the base
microscope ocular - (answer)eyepiece
microscope diopter adjustment ring - (answer)on the ocular, used to make image sharper
Microscope Nosepiece - (answer)holds the objective lenses and rotates to change from one objective to
another
objective lens - (answer)The lens on a light microscope that is closest to the stage.
Microscope Coarse Adjustment Knob - (answer)Moves the stage up and down for focusing
Microscope Fine Adjustment Knob - (answer)Moves the stage slightly to sharpen the image
mechanical stage microscope - (answer)consists of spring clips or clamps to hold a slide in position
microscope diaphragm - (answer)controls the amount of light reaching the slide
microscope condenser - (answer)small substage lens that concentrates the light on the specimen
, Microbiology Lab Practical – Final Exam 2025 UPDATE/PRACTICE QUESTIONS AND
CORRECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADED A+!!!
10x lens - (answer)low power lens
40x lens - (answer)"high-dry" lens
The 40X lens is called the 'high dry' lens. Why do we call it that? - (answer)high objective, but no oil
required
100x lens - (answer)oil immersion lens
resolving power formula - (answer)d = 0.5λ/NA
stage micrometer - (answer)has lines etched on it that are exactly .01 mm (or 10 μm apart)
Winograsky column - (answer)
metachromism - (answer)part of organism that stains a different color than the dye used
basic dyes - (answer)cationic, have positively charged chromophore
acidic dyes - (answer)anionic, have negatively charged chromophore
chromophore - (answer)color bearing ionic group
Bacilli - (answer)Rod shaped bacteria
CORRECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADED A+!!!
bright field microscopy - (answer)light rays pass directly to the eye without being deflected in the
condenser
microscope arm - (answer)the portion of the microscope that connects the lenses to the base
microscope ocular - (answer)eyepiece
microscope diopter adjustment ring - (answer)on the ocular, used to make image sharper
Microscope Nosepiece - (answer)holds the objective lenses and rotates to change from one objective to
another
objective lens - (answer)The lens on a light microscope that is closest to the stage.
Microscope Coarse Adjustment Knob - (answer)Moves the stage up and down for focusing
Microscope Fine Adjustment Knob - (answer)Moves the stage slightly to sharpen the image
mechanical stage microscope - (answer)consists of spring clips or clamps to hold a slide in position
microscope diaphragm - (answer)controls the amount of light reaching the slide
microscope condenser - (answer)small substage lens that concentrates the light on the specimen
, Microbiology Lab Practical – Final Exam 2025 UPDATE/PRACTICE QUESTIONS AND
CORRECT VERIFIED ANSWERS (complete solutions) ASSURED SUCCESS/GRADED A+!!!
10x lens - (answer)low power lens
40x lens - (answer)"high-dry" lens
The 40X lens is called the 'high dry' lens. Why do we call it that? - (answer)high objective, but no oil
required
100x lens - (answer)oil immersion lens
resolving power formula - (answer)d = 0.5λ/NA
stage micrometer - (answer)has lines etched on it that are exactly .01 mm (or 10 μm apart)
Winograsky column - (answer)
metachromism - (answer)part of organism that stains a different color than the dye used
basic dyes - (answer)cationic, have positively charged chromophore
acidic dyes - (answer)anionic, have negatively charged chromophore
chromophore - (answer)color bearing ionic group
Bacilli - (answer)Rod shaped bacteria
