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In the following question, a statement of assertion (A) is followed by a statement of reason (R)
A: Auxotrophic mutants are common in Neurospora.
R: Organisms requiring organic supplemented media are called auxotrophs.
If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
If Assertion is true statement but Reason is false, then mark (3)
If both Assertion and Reason are false statements, then mark (4).
Answers (1)
Assertion (A): Auxotrophic mutants are common in Neurospora.
Neurospora is a genus of filamentous fungi, and it has been extensively studied in genetics and biochemistry. Auxotrophic mutants in Neurospora are relatively common. Auxotrophs are organisms that have lost the ability to synthesize certain essential compounds required for growth and reproduction. In the case of Neurospora, specific auxotrophic mutants have been identified that need additional organic compounds, such as amino acids or vitamins, to grow on minimal media.
Reason(R): Organisms requiring organic-supplemented media are called auxotrophs.
This statement is also true. Auxotrophs are organisms that cannot synthesize certain essential compounds and, as a result, require supplementation with specific organic compounds or nutrients to grow on minimal media. These organic supplements provide the missing essential compounds that the auxotrophic organisms cannot produce themselves. By supplying the required organic compounds in the growth medium, auxotrophic organisms can overcome their growth limitations and thrive.
Therefore, both statements A and R accurately describe the concept of auxotrophs and their common occurrence in Neurospora. Hence, the correct answer is option 1.
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