IB Biology HL 2.2.3 Developments in Microscopy
Practise IB Biology HL 2.2.3 by comparing microscopy methods and interpreting immunofluorescence evidence for specific cell structures.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Compare light and electron microscopes using resolution, magnification, living samples and image quality.
- Explain how immunofluorescence uses fluorescent antibodies to identify specific cell components.
A2.2.3—Developments in microscopy question 1
The images of the radiolarian, a single-celled marine organism, were produced using a light microscope (left) and a scanning electron microscope (right).
What is a reason for the difference in quality of these images?
A
Light cannot pass through the specimen.
B
Higher magnification can be achieved with the electron microscope.
C
The resolution of the electron microscope is higher.
D
Samples are stained with methylene blue when viewed with the light microscope.
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