A-LevelBiologyCell structure9700/12 · May/June 2025 · Q21 Mark
Which statement about a light microscope is correct?
AAs the distance to see two points as separate points decreases, the resolution also decreases.
Bbacterium 0.2 µm in diameter will not be visible if the resolution is 220 nm.
CTwo membranes that are less than 300 nm apart will be visible as two separate membranes if the wavelength of light is 600 nm.
DThe resolution will improve with visible light of a longer wavelength, such as red light.
✓ Correct answer
B: bacterium 0.2 µm in diameter will not be visible if the resolution is 220 nm.
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