10. Streptococcus mutans is one species of bacteria which causes tooth decay - Edexcel - GCSE Biology - Question 10 - 2021 - Paper 1
Question 10
10. Streptococcus mutans is one species of bacteria which causes tooth decay.
A scientist tested the effectiveness of toothpaste at killing this species of bacteria... show full transcript
Worked Solution & Example Answer:10. Streptococcus mutans is one species of bacteria which causes tooth decay - Edexcel - GCSE Biology - Question 10 - 2021 - Paper 1
Step 1
Which word describes the techniques used to prevent contamination of the agar jelly plate?
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Answer
The correct answer is C. aseptic. Aseptic techniques are essential to avoid contamination during the handling of microbial cultures.
Step 2
Give two precautions needed to prevent contamination of the agar jelly plate.
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Answer
Always sterilize equipment, such as loops and petri dishes, before use to eliminate any potential contaminants.
Work near a Bunsen burner flame to create an upward air current, minimizing the risk of airborne contaminants.
