Size of Specimens Quiz
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5 questions, one answer each
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1. A cell is viewed under a microscope with a magnification of ×400. The image size is 8 mm. What is the actual size of the cell in micrometres?
- A. 20 μm
- B. 200 μm
- C. 0.02 μm
- D. 3200 μm
2. Convert 0.5 mm into micrometres.
- A. 50 μm
- B. 500 μm
- C. 5000 μm
- D. 5 μm
3. A specimen's actual size is 100 μm. When viewed under a microscope, the image size is 20 mm. What is the magnification?
- A. ×5
- B. ×200
- C. ×2000
- D. ×0.005
4. A mitochondrion has an actual size of 5 μm. If it is magnified ×1000 under an electron microscope, what will the image size be in millimetres?
- A. 5 mm
- B. 50 mm
- C. 0.5 mm
- D. 0.05 mm
5. A cell nucleus appears 12 mm across in a microscope image with ×600 magnification. Another nucleus of the same species is 30 μm across. Which statement is correct?
- A. Both nuclei are the same actual size
- B. The first nucleus is twice the actual size of the second
- C. The second nucleus is actually larger than the first
- D. The first nucleus is 20 times larger than the second