Study the cycle shown below and select the option which gives correct words for all the four blanks A, B, C and D –

	A	B	C	D
1.	Nitri- fication	Ammoni- fication	Animals	Plants
2.	Denitri- fication	Ammon- ification	Plants	Animals
3.	Nitri- fication	Denitri- fication	Animals	Plants
4.	Denitri- fication	Nitrif- ication	Plants	Animals

Plant prefers to absorb nitrogen in form of nitrate from
soil, then it is reduced to ammonia. This reduction to
ammonia takes place in which part of plant
1. Root.
2. Leaf.
3. Stem.
4. Any

Reaction of N₂ fixation process is depicted below

$N_2+\left[A\right]+\left[B\right]+16 ATP\to$
$2N{H}_3+\left[C\right]+16ADP+16 Pi$

Select the correct set of A,B and C

1. A = $8{\mathrm{e}}^{-}$, B=$8{\mathrm{H}}^{+}$; C = ${\mathrm{H}}_2$

2.  A = ${\mathrm{H}}_2$, B=$8{\mathrm{e}}^{-}$; C = $8{\mathrm{H}}^{+}$

3. A = $8{\mathrm{e}}^{-}$, B=${\mathrm{H}}_2$; C = $8{\mathrm{H}}^{+}$

4. A = $8{\mathrm{H}}^{+}$, B=${\mathrm{H}}_2$; C = $8{\mathrm{e}}^{-}$

Which of the following bacteria reduce nitrate in soil into nitrogen?

1. Nitrobacter

2. Thiobacillus

3. Nitrococcus

4. Nitrosomonas

Which of the following is an amide involved in nitrogen metabolism by plants?

1. Methionine

2. Cysteine

3. Serine

4. Asparagine

The below reaction depicts

1. Reductive amination

2. Transamination

3. Action of enzyme nitrogenise

4. Formation of amide

Boron in green plants assists in
1. activation of enzymes
2. acting as enzyme cofactor
3. photosynthesis
4. sugar transport

Which of the following is the essential requirement of Hydroponics?

Nitrogen

Find the wrong one.

The soil is enriched of dissolved ions and inorganic salts because of