Question

The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule is

A. Nitrogenase  
B. Nitrate reductase
C. Nitrite reductase
D. Nitro-ammoniase
Answer :   Nitrogenase

Releted MCQ Question on
Botany >> Mineral Nutrition

Releted Question 1

In which of the following forms is iron absorbed by plants?

A. Ferric
B. Ferrous
C. Both ferric and ferrous
D. Free element
Releted Question 2

Which of the following elements is responsible for maintaining turgor in cells?

A. Magnesium
B. Sodium
C. Calcium
D. Potassium
Releted Question 3

In which of the following, all three are macronutrients?

A. Boron, zinc, manganese
B. Iron, copper, molybdenum
C. Molybdenum, magnesium, manganese
D. Nitrogen, calcium, phosphorus
Releted Question 4

Minerals known to be required in large amounts for plant growth include :

A. calcium, magnesium, manganese, copper
B. potassium, phosphorus, selenium, boron
C. magnesium, sulphur, iron, zinc
D. phosphorus, potassium, sulphur, calcium

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Mineral Nutrition


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