How many ATP molecules are required to biologically fix one molecule of nitrogen into two molecules of ammonia?
When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are:
1. yellowish leaves
2. colourless petiole
3. dark green leaves
4. shoot apex die.
Select the mismatch.
(a) Frankia Alnus
(b) Rhodospirillium Mycorrhiza
(c) Anabaena Nitrogen fixer
(d) Rhizobium Alfa-fa
Which is essential for the growth of root tip?
In which of the following, all three are macronutrients?
(a) Iron, copper, molybdenum
(b) Molybdenum, magnesium, manganese
(c) Nitrogen, magnesium, phosphorus
(d) Boron, zinc, manganese
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
Minerals known to be required in large amounts for plant growth include
(a) Phosphorus, potassium, sulphur, calcium
(b) calcium, magnesium, manganese, copper
(c) potassium, phosphorus, selenium, boron
(d) magnessium, sulphur, iron, zinc
Deficiency symptoms of nitrogen and potassium are visible first in
(a) senescent leaves
(b) young leaves
The most abundant intracellular cation is
The first stable product of fixation of atmospheric nitrogen in leguminous plants is