Question
Question 4 (4 marks)
Compare light microscopes and electron microscopes in terms of resolution and the types of observations they enable.
Mark scheme (B1, 4 marks):
- Light microscope: lower resolution (~200 nm); can view live cells; can see colour; cheaper and accessible (1–2 marks)
- Electron microscope: much higher resolution (~0.1 nm); shows sub-cellular detail (organelles); cells must be dead; expensive; black and white (1–2 marks)
- Comparison: electron microscope reveals detail impossible to see with light microscope (e.g., internal structure of mitochondria, ribosomes) (1 mark)
4 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.