Question

Observation of a streak-plate culture show more growth in quadrant #4 than in quadrant #3. What could account for this observation? loop was properly sterilized after every single streak ОА. student got distracted and as they were streaking quadrant 14, they crossed through quadrant OB some bacteria show increased motility and travel faster from one quadrant to another ос. the growth rate of bacteria increased as it was incubated at 37°C OD

Answer 1

Correct answer: B.Student got distracted and as they were streaking quadrant #4, they crossed through quadrant #1.

In streak plate method of growing microbial culture, with every quadrant student has to sterilize wire loop. The aim of this method is to get Colonies in decreasing order of their growth.

So, if quadrant#4 has more growth then #3 , it indicate error in streaking technique.

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