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Question

Agar is commercially obtained from


A

Brown algae

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B

Red algae

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C

Blue green algae

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D

Green algae

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Solution

The correct option is B

Red algae


The correct option is B

Explanation of the correct option:

  1. Agar is a jelly-like material that is derived from Red Algae.
  2. The jelly material in algae is due to the presence of unbranched polysaccharides obtained from the cell walls of the red algae.
  3. Agar-agar is used as a thickening agent in jellies, cakes, etc.

Explanation of the incorrect option:

Option A:

Some brown algae are rich in iodine and potash and commonly used in food.

Option C:

Blue-green algae are photosynthetic nitrogen fixators.

Option D:

Green algae such as moss are used for the packing of substances.

Final answer: Agar is commercially obtained from red algae.


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