Assertion :While working on staphylococci, Alexander Fleming observed that Penicillium notatum inhibits the growing of bacteria. Reason: The inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Penicillin is a secondary metabolite of certain species of Penicillium and is produced when the growth of the fungus is inhibited by stress. It is not produced during active growth. Production is also limited by feedback in the synthesis pathway of penicillin. It was discovered by Fleming, Chain, Florey.
So, the correct option is 'Assertion is correct but Reason is incorrect'.

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Similar questions

Assertion: While working on Staphylococci, Alexander Fleming observed that Penicillium notatum inhibits the growing of bacteria.

Reason: The inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming

Given above are assertion and reason. Point out

Q. Assertion :While working on Staphylococci, Alexander Fleming observed that Penicillium notatum inhibits the growth of bacteria Reason: The inhibiting chemical was commercially extracted and its full potential was established by Alexander Fleming.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
High biological oxygen demand means low activity of bacteria in water.

Assertion (A) Order of the reaction can be zero or fractional.

Reason (R) We cannot determine order from balanced chemical equation.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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