Study the cycle shown below and select the option which gives the correct words for all four blanks A, B, C, and D:
Options:
A
B
C
D
1.
Denitrification
Ammonification
Plants
Animals
2.
Nitrification
Denitrification
Animals
Plants
3.
Denitrification
Nitrification
Plants
Animals
4.
Nitrification
Ammonification
Animals
Plants
Which of the following elements helps in maintaining the structure of ribosomes?
1. Magnesium
2. Zinc
3. Copper
4. Molybdenum
In Glycine max, the product of biological nitrogen fixation is transported from the root nodules to other parts as:
1. Ammonia
2. Glutamate
3. Nitrates
4. Ureides
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Column II
(mineral) (function in humans)
I. Copper 1. Buffer action
II. Phosphorus 2. Melaniin synthesis
III. Sulphur 3. CO2 transport
IV. Zinc 4. Normal metabolism
Codes:
|
I |
II |
III |
IV |
|
|
1. |
1 |
2 |
3 |
4 |
|
2. |
2 |
1 |
4 |
3 |
|
3. |
2 |
1 |
3 |
4 |
|
4. |
1 |
2 |
4 |
3 |
Match Column-I with Column- II.
| Column I | Column II | ||
| (a) | Nitrococcus | (i) | Denitrification |
| (b) | Rhizobium | (ii) | Conversion of ammonia to nitrite |
| (c) | Thiobacillus | (iii) | Conversion of nitrite to nitrate |
| (d) | Nitrobactèr | (iv) | Conversion of atmospheric nitrogen to ammonia |
Choose the correct answer from the options given below:
| Options: | (a) | (b) | (c) | (d) |
| 1. | iii | i | iv | ii |
| 2. | iv | iii | ii | i |
| 3. | ii | iv | i | iii |
| 4. | i | ii | iii | iv |
Mark the correct option with respect to hydroponics
1. It can avoid problem of soil borne pathogens
2. It avoids problem of weeding
3. Out of season vegetables and flowers can be obtained
4. all of these
Match the following concerning essential elements and their functions in plants:
| Column I | Column II | ||
| (a) | Iron | (i) | Photolysis of water |
| (b) | Zinc | (ii) | Pollen germination |
| (c) | Boron | (iii) | Required for chlorophyll biosynthesis |
| (d) | Manganese | (iv) | IAA biosynthesis |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iv) | (iii) |
The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.
1. Nitrate alone
2. Ammonia and oxygen
3. Ammonia and hydrogen
4. Ammonia alone
Identify the incorrect statement:
1. Frankia does not produce nitrogen-fixing nodules on the roots of non-leguminous plants
2. Microbes like Rhizobium live as aerobes under free living condition and become anaerobic during nitrogen fixing events
3. Nitrogenase is a Mo-Fe protein
4. Azotobacter and Beijernickia are free-living are free living nitrogen-fixing aerobic microbes.
For each NH3 produced, the number of ATP molecules required by the nitrogenase enzyme is:
1. 4
2. 8
3. 12
4. 16
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