Tools Techniques - Questions & Answers | Exam2Win

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291. Fluorescence microscope is useful for

A. Localisation of structures having affinity for fluorochromes

B. Study of cell components in living state

C. Obtaining X-ray diffraction photographs

D. Its very high resolving power

Explanation:

292. Maximum magnification in an electron microscope is

A. 2,000

B. 20,000

C. 200

D. 200,000

Explanation:

293. A living cell can be best studied by means of

A. Dark field microscope

B. Electron microscope

C. Phase-contrast microscope

D. Compound microscope

Explanation:

294. Separation of DNA fractions having ¹⁵N/ ¹⁵N, ¹⁵N/ ¹⁴N and ¹⁴N/ ¹⁴N was carried out by Meselson and Stahl through

A. Buoyant density centrifugation

B. Density gradient centrifugation

C. Ion exchange chromatography

D. Affinity chromatography

Explanation:

295. The technique used in the detection of particular protein is

A. Buoyant density centrifugation

B. Density gradient centrifugation

C. Immuno-electrophoresis

D. Both B and C

Explanation: