15994.
Assertion: Deficiency of sulphur causes chlorosis in plants.
Reason: Sulphur is a constituent of chlorophyll, proteins and nucleic acids.
Both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion.
Both the Assertion and the Reason are true but the Reason is not a correct explanation of Assertion.
Assertion is true but the Reason is false.
Both the Assertion and the Reason are false.
15995.Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?
Crotalaria juncea
Casuarina equisetifolia
Cicer arietinum
Cycas revoluta
15996.Which one of the following elements in plants is not remobilized?
Calcium
Phosphorus
Sulphur
Potassium
15997.The minerals involved in water-splitting reaction during photosynthesis are
Magnesium Chlorine
Potassium and Manganese
Manganese and Chlorine
Molybdenum Manganese
15999.If by radiation all nitrogenase enzyme are inactivated, then there will be no
Conversion from ammonium to nitrate in soil
Conversion from nitrate to nitrite in legumes
Fixation of atmospheric nitrogen
Fixation of nitrogen in legumes
16000.In root nodules of legumes, leg-haemoglobin is important because it
Transports oxygen to the root nodule
Acts as an oxygen scavenger
Provides energy to the nitrogen fixing bacterium
Acts as a catalyst in transamination
16001.Select the matched ones:
a. Nitrosomonas - Nitrite to nitrate
b. Thiobacillus - Denitrification
c. Nostoc - Free-living nitrogen-fixer
d. Azotobacter - Anaerobic nitrogen-fixer
a and b only
c and d only
b and c only
b and d only
16002.A nutritionally wild type organism, which does not require any additional growth supplement is known as:
Holotype
Auxotroph
Prototroph
Phenotype
16003.Match the followings an choose the correct combination from the options given:
| List - I | List - II | ||
|---|---|---|---|
| a. | Photolysis of water | 1. | Zinc |
| b. | Diazotrophy | 2. | Copper |
| c. | Cytochrome c oxidase | 3. | Manganese |
| d. | Biosynthesis of IAA | 4. | Molybdenum |
| 5. | Boron | ||
a – 3, b – 2, c – 1, d – 5
a – 3, b – 4, c – 2, d – 1
a – 5, b – 2, c – 3, d – 4
a – 4, b – 1, c – 3, d – 2