Which one of the following is not a nitrogen-fixing organism?
Identify the incorrectly matched pair
Mineral Functions in plants
1. Potassium Opening and closing of stomata, Activation of enzymes
2. Magnesium Maintenance of ribosome structure, Structure of chlorophyll
3. Boron Pollen germination, Carbohydrate translocation
4. Molybdenum Water splitting in photosynthesis, Nitrogen metabolism
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.
(1) Frankia Alnus
(2) Rhodospirillium Mycorrhiza
(3) Anabaena Nitrogen fixer
(4) Rhizobium Alfa-fa
Which is essential for the growth of root tip?
In which of the following, all three are macronutrients?
(1) Iron, copper, molybdenum
(2) Molybdenum, magnesium, manganese
(3) Nitrogen, magnesium, phosphorus
(4) Boron, zinc, manganese
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements involved in this reaction?
1. Manganese and chlorine
2. Manganese and potassium
3. Manganese and molybdenum
4. Magnesium and chlorine
Minerals known to be required in large amounts for plant growth include
1. Phosphorus, potassium, sulphur, calcium
2. calcium, magnesium, manganese, copper
3. potassium, phosphorus, selenium, boron
4. magnessium, sulphur, iron, zinc
Deficiency symptoms of nitrogen and potassium are visible first in
1. senescent leaves
2. young leaves