Nitrogen fixation in root nodules of Alnus is brought about by:
Options
(a) Bradyrhizobium (b) Clostridium (c) Frankia (d) Azorhizobium
Correct Answer:
Frankia
Explanation:
The most common symbiotic association of legume and bacteria […]
A prokaryotic autotrophic nitrogen fixing symboint is found in:
Options
(a) Alnus (b) Cycas (c) Cicer (d) Pisum
Correct Answer:
Cycas
Explanation:
A prokaryotic autotrophic nitrogen fixing symbiont is found in Cycas.
Which one of the following is essential for photolysis of water?
Options
(a) Manganese (b) Zinc (c) Copper (d) Boron
Correct Answer:
Manganese
Explanation:
Photolysis is catalysed by the portein-bound inorganic complex containing manganese […]
Which one of the following elements in plants is not remobilised?
Options
(a) Phosphorus (b) Calcium (c) Potassium (d) Sulphur
Correct Answer:
Calcium
Explanation:
Calcium is not remonilized from the leaves to the […]
The function of leg haemoglobin in the root nodules of legumes is:
Options
(a) inhibition of nitrogenase activity (b) oxygen removal (c) nodule differentiation (d) expression of nif gene
Correct Answer:
oxygen removal
Which one of the following is not an essential mineral element for plants while the remaining three are?
Options
(a) Iron (b) Manganese (c) Cadmium (d) Phosphorus
Correct Answer:
Cadmium
Explanation:
Cadmium is […]
Which one of the following pairs is wrongly matched?
Options
(a) Alcohol – nitrogenase (b) Fruit juice – pectinase (c) Textile – amylase (d) Detergents – lipase
Correct Answer:
Alcohol – nitrogenase
Explanation: […]
Which of the following criteria does not pertain to fecilitated transport?
Options
(a) High selectively (b) Transport saturation (c) Uphill transport (d) Requirement of special membrane proteins
Correct Answer:
Uphill transport
Explanation:
Substances […]
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