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Laboratory Techniques
Quick questions on Bacterial culture and plating: O-Level Laboratory Techniques
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is growing media?Show answer
Bacteria are grown on nutrient media containing the food they need:
What are streaking for single colonies?Show answer
Streaking spreads bacteria thinly so that single cells end up well separated:
What is spread plates for counting?Show answer
To count bacteria, a spread plate is used:
What is q1?Show answer
State why a culture is streaked across an agar plate. [1 mark]
What is q2?Show answer
Explain why agar plates are incubated upside down. [2 marks]
What is q3?Show answer
Explain why each colony on a spread plate can be counted as coming from one cell. [2 marks]
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