Question

In plants, nitrate is reduced to ammonia state in two steps. In second step, electrons are donated by.

• A. Ferredoxin
• B. Nitrate reductase
• C. Nitrite reductase
• D. Cytochroms $b_5$
• E. Cytochrome $P_{450}$

Answer 1

The correct option is A Ferredoxin

Nitrate assimilation is the process in which the absorbed nitrate is reduced by the enzyme nitrate. It is possible with the help of reduced coenzymes into nitrite. Nitrite is then reduced by enzyme nitrite reductase with the help of reduced coenzymes and ferredoxin further into ammonia. Ferredoxin supplies electrons one by one for this reduction. Therefore Ferredoxin is the correct answer.

The correct option is A.