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Biology · 2025 · 1 mark
CBSE 2025 · Region 1 · Set 2 · Q14
Assertion (A): While working on Staphylococci, Alexander Fleming observed that Penicillium notatum inhibits the growth of bacteria. Reason (R): The…
Assertion (A) : While working on Staphylococci, Alexander Fleming observed that Penicillium notatum inhibits the growth of bacteria.
Reason (R) : The inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming.
Official answer
(C)
(A) is true, but (R) is false.
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.