Bacterial Identification | MCQs
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A. Gram positive
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B. Gram negative
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C. Gram neutral
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D. Gram purple
Explanation
Gram-positive bacteria stain purple or blue with the Gram stain.
This is due to their thick peptidoglycan cell wall, which retains the primary stain (crystal violet) even after decolorization.
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A. Vibrio
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B. Bacilli
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C. Cocci
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D. Spirilla
Explanation
Atrichous bacteria are bacteria that lack flagella, and Bacillus is a rod-shaped bacteria that is classified as atrichous.
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