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71. A student wishes to study the cell structure under a light microscope having 10 X eye piece and 45 X objective. For best resolution, the object should be illuminated by light
A. Blue
B. Green
C. Yellow
D. Red
Explanation:
72. Svedberg was awarded Nobel Prize for development of
A. Chromatography
B. Centrifugation technique
C. Karyotyping
D. Electrophoresis
Explanation:
73. A chemical substance irradiated with ultraviolet rays emits visible light. It is called
A. Luminescent
B. Bioluminescent
C. Fluorochrome
D. Metachrome
Explanation:
74. A microorganism viewed under microscope with 40 X objective and 10 X eye piece measures 4000 μm. The same microorganism observed under dissection microscope with 10 X lens would measure
A. 40 μm
B. 100 μm
C. 10 μm
D. 400 μm
Explanation:
75. Electron microscope is used for
A. Study of cell division
B. Viewing cell structure
C. Viewing pollen grain
D. Viewing structure of large biomolecules
Explanation:
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