Question

Assertion (A): The exact chemical composition of complex microbial growth media is known.
Reason (R): Complex nutrient media is used when specific growth requirement of a microorganism is unknown.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Hint:

It is important to know the differences between defined and undefined media and their applications.

Answer 1

The Correct Option is D

Assertion (A): Incorrect. The precise chemical makeup of complex microbial growth media is typically not fully known or defined. These media often contain intricate combinations of ingredients such as yeast extract, meat extract, blood, and peptones, rendering their exact composition unclear. Reason (R): Correct. Complex media are generally employed when the specific growth necessities of a microorganism are not understood. The diverse nutrient profiles within these complex mixtures support the growth of such organisms. Explanation: Consequently, with the assertion being incorrect and the reason being correct, option (D) is the appropriate choice.