Question

Identify the stain that is used to observe lactobacillus bacterium. *

Jenus B-green

Red ink

Crystal violet

Glycerine

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Answer 1

Radius of the roller (r) = 84/ 2 cm = 42 cm Length of the roller (h) = 120 cm Curved surface area of the roller = 2πrh = 2 × 22/ 7 × 42 × 120 cm2 = 44 × 720 cm2 = 31680 cm2 ∴ area covered by the roller in 1 revolution = 31680 cm2 ∴ area covered by the roller in 500 revolutions = 31680 × 500 cm2 = 15840000 cm Hence, area of the playground = 15840000/ 100× 100 m2 = 1584 m2

Answer 2

Answer:

I hope this helps you

Explanation:

the answer is iodine

explanation: Lactobacilli is a gram-positive bacteria, which means that it can easily take up stains exerted by the iodine applied onto it. In the process of gram staining, the bacteria are first stained with iodine followed by washing it with alcohol

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