Methods of Studying Cells (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
How many divisions are marked on a standard eyepiece graticule?
How many divisions are marked on a standard eyepiece graticule?
100 divisions
What is the size of the smallest divisions on a stage micrometer?
What is the size of the smallest divisions on a stage micrometer?
10μm
Why must an eyepiece graticule be calibrated for each objective lens?
Why must an eyepiece graticule be calibrated for each objective lens?
Different lenses produce varying magnification
If 10 micrometer units align with 40 graticule units, what is the value per graticule unit?
If 10 micrometer units align with 40 graticule units, what is the value per graticule unit?
2.5μm
A ×40 lens gives 2.5μm per graticule unit. What value does a ×400 lens give?
A ×40 lens gives 2.5μm per graticule unit. What value does a ×400 lens give?
0.25μm
How many micrometres equal 1 millimetre?
How many micrometres equal 1 millimetre?
1,000μm
An image measures 23mm and actual size is 5μm. What is the magnification?
An image measures 23mm and actual size is 5μm. What is the magnification?
4,600×
At 4,600× magnification, a 20mm image represents what actual size?
At 4,600× magnification, a 20mm image represents what actual size?
4.3μm
What is the typical total length of a stage micrometer scale?
What is the typical total length of a stage micrometer scale?
2mm
How should non-spherical cellular structures be measured for accuracy?
How should non-spherical cellular structures be measured for accuracy?
Multiple measurements, calculate mean