Assertion A- Higher plants can not utilize nitrogen that is present in the form of N 2 in air- Reason R- In higher plants- the nitrogenase enzyme is absent-A- Both A - R are true and R explains AB- Both A - R are true and R does not explain AC- Both A - R falseD- A is true and R is False

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Biological Nitrogen Fixation

Assertion A: ...

Question

Assertion (A): Higher plants can not utilize nitrogen that is present in the form of $N_{2}$ in air.

Reason (R): In higher plants, the nitrogenase enzyme is absent.

Both A & R are true and R explains A

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Both A & R are true and R does not explain A

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A is true and R is False

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Both A & R false

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Solution

The correct option is A
Both A & R are true and R explains A

Nitrogenase can only break N ≅ N bond and it is absent in higher plants, hence they cannot utilize $N_{2}$ present in the air.

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Assertion (A): Higher plants can not utilize nitrogen that is present in the form of N2 in air. Reason (R): In higher plants, the nitrogenase enzyme is absent.

The correct option is A Both A & R are true and R explains A Nitrogenase can only break N ≅ N bond and it is absent in higher plants, hence they cannot utilize N2 present in the air.

Assertion (A): Higher plants can not utilize nitrogen that is present in the form of $N_{2}$ in air.

Reason (R): In higher plants, the nitrogenase enzyme is absent.

The correct option is A
Both A & R are true and R explains A

Nitrogenase can only break N ≅ N bond and it is absent in higher plants, hence they cannot utilize $N_{2}$ present in the air.