HW_Ch 2 ans key - HW answer key_Ch 2 MCQ: 1) D 2) D 3) D 4)...

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HW answer key_Ch 2 MCQ: 1) D 2) D 3) D 4) B 5) B 6) A 7) D Fill in the blanks: 1) Smear 2) Differential 3) Freeze-etching 4) Focal point 5) Fluorochromes True / False: 1) False 2) True 3) False 4) False 5) False
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Short essay questions: Difference between positive and negative stains: Positive stain Negative stain Appearance of cells/ background Cells colored by dye/ background colorless usually Cells colorless/ background is colored Dyes employed Basic dyes; crystal violet, methylene blue, safranin, malachite green Acidic dyes; nigrosin, Indian ink Subtypes Simple stain, Gram stain, Acid- fast stain, Capsule stain, Endospore stain, Nucleic acid stains Capsules and spores 2) Oil-immersion lens A drop of oil between the tip of the objective lens and the specimen on the glass slide improves the resolution to its maximum. Because oil has the same optical qualities as glass, it prevents refractive loss that normally happens as peripheral light passes from glass to air. This property effectively reduces light scattering and increases resolution.
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HW_Ch 2 ans key - HW answer key_Ch 2 MCQ: 1) D 2) D 3) D 4)...

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