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SSC Selection Post 2024 PYQ — Question 28

SSC Selection Post - Graduation Level - 21 June 2024 - Shift 3 • General Awareness • Q28

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Select the INCORRECT statement about Agar.

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Correct answer: C

Explanation

The correct answer is option 3 i.e. It is used as nutrient and source of fat of bacterial culture.

 

Explanation:

  • Agar is a gelatinous substance derived mainly from red algae, particularly species like Gelidium and Gracilaria.

  • It is widely used in microbiology as a solidifying agent for culture media to grow microbes, but not as a nutrient or fat source.

  • Agar provides a stable medium for microbes to grow when nutrients are added separately.

  • It has no significant nutritional value for most microorganisms — it is inert.

  • Agar is also used in the food industry to improve texture in products like ice-creams and jellies.

  • Hence, the statement that agar is a nutrient and fat source for bacteria is incorrect.