Tools Techniques - Questions & Answers | Exam2Win

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256. Dehydration of specimen for SEM is carried out in alcohol at

A. - 70°C

B. - 35°C

C. - 5°C

D. 15°C

Explanation:

257. A nanometre (nm) is

A. 10⁻⁹ m

B. 10⁻⁷ m

C. 10 Å

D. All the above

Explanation:

258. Homogenisation is

A. Breaking a tissue into cells

B. Crushing a tissue to separate cells from intercellular substances

C. Breaking of cells and suspending them in 0.25 M sucrose solution

D. Separation of different cellular components

Explanation:

259. A technique used to study substances present inside cells, their extracts and emissions is

A. Chromatography

B. Electrophoresis

C. Specific stains

D. Microspectrophotometry

Explanation:

260. Taylor (1958) studied chromosome replication by using radioactive

A. Uridine

B. Thymidine

C. Histones

D. Phosphate

Explanation: