Live cells can be imaged by (a) Light microscopy (b) Electron microscopy (c) Bot

Question

Live cells can be imaged by (a) Light microscopy (b) Electron microscopy (c) Both kinds of microscopy (d) With the naked eye. A carbon atom has a valency of (a) 2 (b) 3 (c) 4 or (4) 5 A covalent bond between C, H and O atoms can be broken by (a) Visible light (b) Ultra-violet light (c) Infra red light (d) All of the above. Water is a very good solvent for (a) Salts (b) Fats (c) Carbohydrates (d) Salts and some carbohydrates. Denaturation of nucleic acids refers to (a) Separation of complementary strands (b) Dissociation of complementary regions of the same strand (c) Either of the above (d) Degradation of the molecule

Explanation / Answer

The correct answer is light microscope. The light transfers through and the optics magnify the object, so we can clearly observe the live cells through the light microscope. The electron microscope is not used because the specimen preparation for live cells may destroy them, this is the major disadvantage of electron microscope.

Q2:

Carbon valence is 4

Q3. Ultra violet

Q4. Option D

Q5. Option A

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