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
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 |
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
1. Ammonium ions
2. Nitrate ions
3. Nitrite ions
4. Ammonia
1. is a micronutrient for plants
2. is a constituent of cell membranes
3. is involved in opening and closing of stomata directly
4. is used in synthesis of middle lamella
1. 1 %
2. 2 %
3. 5 %
4. 10 %
1. Frankia produces nitrogen-fixing nodules on the roots of non-leguminous plants
2. Azotobacter and Beijerinckia fix atmospheric nitrogen only as symbionts
3. Rhodospirillum is aerobic
4. No cyanobacteria are diazotrophs
1. Beneficial elements
2. Toxic elements
3. Trace elements
4. Macronutrient elements
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