Mineral Function

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause a decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?

1.	Frequent irrigation of the crop
2.	Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer
3.	Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid
4.	Application of iron and magnesium to promote the synthesis of chlorophyll

Sulphur is an important nutrient for optimum growth and productivity in:

1. pulse crops

2. cereals

3. fibre crops

4. oilseed crops

A plant requires magnesium for:

1. holding cells together

2. protein synthesis

3. chlorophyll synthesis

4. cell wall development

Manganese is required in:
1. nucleic acid synthesis
2. plant cell wall formation
3. photolysis of water during photosynthesis
4. chlorophyll synthesis

An element playing important role in nitrogen fixation is:

1. molybdenum

2. copper

3. manganese

4. zinc

Best defined function of manganese in green plants is :

1. Photolysis of water

2. Calvin cycle

3. Nitrogen fixation

4. Water absorption

Which one of the following is a wrong statement?

1.	Anabaena and Nostoc are capable of fixing nitrogen in a free-living state also
2.	Root nodule-forming nitrogen fixers live as aerobes under free-living conditions
3.	Phosphorus is a constituent of cell membranes, certain nucleic acids, and all proteins
4.	Nitrosomonas and Nitrobacter are chemoautotrophs

The most abundant intracellular cation is:
1. Ca²⁺
2. H⁺
3. K⁺
4. Na⁺

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements are involved in this reaction?

1. Manganese and chlorine

2. Manganese and potassium

3. Magnesium and molybdenum

4. Magnesium and chlorine

Which is essential for the growth of root tip?

1.	Zn	2.	Fe
3.	Ca	4.	Mn

Which of the following elements helps in maintaining the structure of ribosomes?

1. Magnesium

2. Zinc

3. Copper

4. Molybdenum

Match List - I with List - II

	List I		List II
(a)	Manganese	(i)	Activates the enzyme catalase
(b)	Magnesium	(ii)	Required for pollen germination
(c)	Boron	(iii)	Activates enzymes of respiration
(d)	Iron	(iv)	Functions in splitting of water during photosynthesis

Choose the correct answer from the options given below:

	(a)	(b)	(c)	(d)
1.	(iii)	(i)	(ii)	(iv)
2.	(iii)	(iv)	(i)	(ii)
3.	(iv)	(iii)	(ii)	(i)
4.	(iv)	(i)	(ii)	(iii)

Which micronutrient is required for splitting of water molecule during photosynthesis?

1.	Copper	2.	Manganese
3.	Molybdenum	4.	Magnesium

Match List I with List II:

	List I		List II
A.	Iron	I.	Synthesis of auxin
B.	Zinc	II.	Component of nitrate reductase
C.	Boron	III.	Activator of catalase
D.	Molybdenum	IV	Cell elongation and differentiation

Choose the correct answer from the options given below:

Options:	A	B	C	D
1.	II	IV	I	III
2.	III	II	I	IV
3.	II	III	IV	I
4.	III	I	IV	II