Home
Class 12
BIOLOGY
Agar is used as culture medium because i...

Agar is used as culture medium because it

A

Provides nourishment

B

Remains as solid jelly

C

Resistant to microorganic breakdown

D

Both B and C .

Text Solution

AI Generated Solution

The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Agar**: Agar is a jelly-like substance derived from red algae. It is primarily composed of two polysaccharides: agarose and agaropectin. 2. **Properties of Agar**: - Agar acts as a solidifying agent in culture media. - One of its key properties is that it remains solid at room temperature, which is essential for maintaining the integrity of the culture medium. 3. **Nutritional Value**: Agar does not provide nourishment to the microorganisms; it serves mainly as a structural medium. 4. **Resistance to Decomposition**: Agar is resistant to microbial breakdown, which means it does not decompose easily when exposed to bacteria. This property is crucial as it allows the target organisms in the culture to thrive without interference from unwanted microbial growth. 5. **Evaluating the Options**: - **Option A**: "Provides nourishment" - This is incorrect because agar does not provide nutrients. - **Option B**: "Remains as solid jelly" - This is correct since agar remains solid at room temperature. - **Option C**: "Resistance to microorganic breakdown" - This is also correct as agar is resistant to bacterial decomposition. - **Option D**: "Both B and C" - Since both B and C are correct, this option is the best choice. 6. **Conclusion**: The correct answer is option D, which states that agar remains as a solid jelly and is resistant to microbial breakdown.
Promotional Banner

Topper's Solved these Questions

  • MAMMALIA [MAMMA - BREAST]

    DINESH PUBLICATION ENGLISH|Exercise Check your grasp|10 Videos

  • LOCOMOTION AND MOVEMENT

    DINESH PUBLICATION ENGLISH|Exercise CHECK YOUR GRASP|10 Videos

  • MICROBES IN HUMAN WELFARE

    DINESH PUBLICATION ENGLISH|Exercise Brain Teasers-VIII|60 Videos

Similar Questions

Explore conceptually related problems

Which of the following algae is used to prepare culture medium to grow microbe ?

Coconut milk ( coconut water ) is widely used in tissue culture because it contains

A population of Paramecium caudatum was grown in a culture medium. After 5 days the culture medium became overcrowded with Paramecium and had depleted nutrients. What will happen to the population and what type of growth curve will population attain? Draw the growth curve.

Assertion: Agar is used to solidify the medium Reason: Higher concentration of agar makes the medium hard and diffusion of nutrients in plant tissues may be checked.

How would lac operon operate in E. coli growing in a culture medium where lactose is present as source of sugar ?

How would lac operon operate in E. coli growing in a culture medium where lactose is present as source of sugar ?

Duramen is used as timber because

Agar-agar, an important solidifying agent used in culture medium, is obtained from

Tissue culture medium is sterilised by

Alongwith auxin, another hormone is used in culture technique. It is