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Nitrogen Cycle

Assertion: Ma...

Question

Assertion: Manganese is an activator of enzyme nitrite reductase. Reason: Manganese deficient cells prefer ammonia over nitrate.

A

Both assertion and reason are true and the reason is the correct explanation for the assertion.

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B

Both the reason and assertion are true but the assertion is not the correct explanation for reason.

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C

Assertion is true but reason is false.

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D

Both the reason and assertion are false

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Solution

The correct option is A Both assertion and reason are true and the reason is the correct explanation for the assertion.
Mn plays an important role in nitrate reduction. Manganese acts as an activator for the enzyme nitrite reductase and hydroxylamine reductase. The preference of ammonia over nitrate as a nitrogen source by the manganese – deficient cells supports the above mention analysis of the role of manganese.

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