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Introduction to Biotechnology
Quick questions on Scale and units in biotechnology: O-Level Introduction
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 units of volume?Show answer
In molecular biology the volumes are tiny, so we work below the litre:
What is a sense of scale?Show answer
Holding the scale in mind helps you check that an answer is sensible:
What are converting between units?Show answer
To go from a larger unit to a smaller one, multiply. To go from a smaller unit to a larger one, divide. Because each step is a factor of , conversions are quick once you know which way to move.
What is q1?Show answer
Convert to micrometres. [1 mark]
What is q2?Show answer
A culture contains cells per millilitre. How many cells are in ? [2 marks]
What is q3?Show answer
State the most suitable unit for measuring (a) the width of a DNA molecule and (b) the volume of a reagent in a PCR. [2 marks]
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