Tools Techniques - Questions & Answers | Exam2Win

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46. In which microscope direct observation is not possible

A. Compound microscope

B. Dark field microscope

C. Phase contrast microscope

D. Ultraviolet microscope

Explanation:

47. Fuelgen reaction involves

A. Reactions of deoxyribose sugar with leucofuchsin

B. Removal of purines by hydrolysis

C. Reaction of free aldehyde groups with Schiff’s reagent

D. Both B and C

Explanation:

48. Electron microscope is more advantageous than light microscope because it

A. Requires no light

B. Has higher magnification

C. Gives depth focus

D. Uses vacuum

Explanation:

49. Angstrom (Å) is equal to

A. 0.01 μm

B. 0.001 μm

C. 0.0001 μm

D. 0.00001 μm

Explanation:

50. Electron microscope has a high resolution power. This is due to

A. Electromagnetic lenses

B. Very low wavelength of electron beam

C. Low wavelength of light source used

D. High numerical aperture of glass lenses used

Explanation: