Mineral Nutrition Test

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Mineral Nutrition Test - 82

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Weekly Quiz Competition

Question 1
1 / -0

Nostoc fixes nitrogen in the symbiotic association of the following.
1. Alnus
2. Gunnera
3. Anthoceros
4. Casuarina
The correct combination is

A
$$1$$ and $$2$$

B
$$1$$ and $$3$$

C
$$1$$ and $$4$$

D
$$2$$ and $$3$$

Solution

The atmospheric nitrogen is not available to plants. There are some nitrogen-fixing bacteria which converts atmospheric nitrogen into ammonia which is readily available to plants. Nostoc is a Cyanobacterium. It has the ability to fix atmospheric nitrogen. It fixes nitrogen in the symbiotic association with the plans like Gunnera and Anthoceros.
Thus, the correct answer is '2 and 3.'
Question 2
1 / -0

A filamentous nitrogen fixing bacterium is present in root nodules of flowering plants is

A
Cicer arietinum

B
Casuarina equisetifolia

C
Cycas revoluta

D
Crotalaria juncea

Solution

Nitrogen fixation is a process by which atmospheric nitrogen is converted into ammonium compounds and made available for plants. They are of two types, free living and symbiotic. Symbiotic nitrogen fixing bacteria are present in the root nodules of legumenous plants. Casuarina equisetifolia is a deciduous tree. It belongs to genus Casuarina. All the Casuarinas are nitrogen fixing. A filamentous nitrogen fixing bacteria, Frankia is present in the root nodules of flowering plant Casuarina equisetifolia.
Thus, the correct answer is 'Casuarina equisetifolia.'
Question 3
1 / -0

Phosphorus brings about

A
Retardation of protein synthesis

B
Healthy root growth

C
Fruit ripening

D
Retarded plant growth

Solution

Phosphorus is a macronutrient absorbed by the plant in the form of phosphate ions. It is a constituent of cell membranes, nucleotide, ATP, nucleic acids, phospholipids and some coenzymes. It brings about healthy root growth, shoot growth and strength in the plant.
So the correct answer is 'Healthy root growth'.
Question 4
1 / -0

Boron assists in

A
Activation of enzymes

B
Photosynthesis

C
Sugar transport

D
Acting as enzyme cofactor

Solution

Boron is a micronutrient required by the plant in a small amount. It is absorbed by the plant in the form of Boron ions. It is required for uptake and utilization of Ca+. It is necessary for membrane functioning, pollen germination, cell elongation and cell differentiation. It is also required for sugar translocation through the phloem.
So the correct is 'Sugar transport'.
Question 5
1 / -0

Micronutrient absorbed by foliage is

A
Zinc

B
Phosphorus

C
Aluminium

D
Boron

Solution

Zinc is a micronutrient absorbed by the plant as Zn+ ions. It is absorbed foliage of plants. It helps inactivation of various enzymes such as carboxylases, dehydrogenases and carbonic anhydrase. It's deficiency cause leaf malformation and leaf rosettes in a plant.
So the correct answer is 'Zinc'.
Question 6
1 / -0

Match the columns.
I II
a Aerobic $$1$$. Frankia
b Cyanobacteria $$2$$. Azospirillum
c. Casuarina $$3$$. Clostridum
d. Tropical grasses $$4$$. Aulosira
$$5$$. Azotobacter

A
$$a-4, b-3, c-2, d-1$$

B
$$a-5, b-3, c-4, d-1$$

C
$$a-5, b-4, c-1, d-2$$

D
$$a-3, b-5, c-4, d-2$$

E
$$a-2, b-1, c-3, d-5$$

Solution

a) Azotobacter is anaerobic and free-living nitrogen-fixing bacteria.
b) Aulosira is a cyanobacterium that forms colonies composed of filaments of moniliform cells.
c) Casuarina is a plant that has free-living nitrogen-fixing bacteria Frankia in the roots.
d) Tropical grasses have free-living nitrogen-fixing bacteria azospirillum that can promote plant growth.

So the correct answer is C.
Question 7
1 / -0

Brown heart of heart rot disease is due to deficiency of

A
Iron

B
Boron

C
Potassium

D
Molybdenum

Solution

Boron is a micronutrient required in small amount by the plant. It is necessary for membrane functioning, cell elongation and cell differentiation. It's deficiency results in heart rot disease in a plant which can cause structural weakness and can lead to broken trunk and branches.
So the correct answer is 'Boron'.
Question 8
1 / -0

Molybdenum is involved in plant metabolism in

A
Translocation of solutions

B
Nitrate reduction

C
Tryptophan synthesis

D
Ascorbic acid synthesis

Solution

Molybdenum is a micronutrient. It is absorbed by the plant in the form of molybdate ions. It is a component of several enzymes including nitrogenase and nitrate reductase. Thus it is involved in the plant metabolism in nitrate reduction.
So the correct answer is 'Nitrate reduction'.
Question 9
1 / -0

Plants growing in Mg deficient soil will show

A
Deep gree foliage

B
Early flowering

C
Yellowing of leaves

D
Loss of pigmentation in petals

Solution

Magnesium is a macronutrient, absorbed by the plant in the form of Mg++ ions. It is a constituent of the ring structure of chlorophyll. It activates the enzymes of respiration, photosynthesis and are involved in the synthesis of DNA and RNA. In it's deficiency, plant will show yellowing of leaves, marginal curling and pre mature leaf abscission.
So, the correct answer is 'Yellowing of leaves'.
Question 10
1 / -0

Scientist credited with development of formula for balanced solution of mineral elements is?

A
Knop

B
Went

C
Hill

D
Emerson

Solution

Knop was a scientist who is credited with the development of the formula for the balanced solution of mineral elements. He along with Sach discovered the macronutrient and conclude that Iron is essential in plants.
so the correct answer is 'Knop'.

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Re-Attempt Weekly Quiz Competition

	I		II
a	Aerobic	$$1$$.	Frankia
b	Cyanobacteria	$$2$$.	Azospirillum
c.	Casuarina	$$3$$.	Clostridum
d.	Tropical grasses	$$4$$.	Aulosira
		$$5$$.	Azotobacter

Mineral Nutrition Test - 82

Result

Mineral Nutrition Test - 82

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SHARING IS CARING

Question 1

$$1$$ and $$2$$

$$1$$ and $$3$$

$$1$$ and $$4$$

$$2$$ and $$3$$

Solution

Question 2

Cicer arietinum

Casuarina equisetifolia

Cycas revoluta

Crotalaria juncea

Solution

Question 3

Retardation of protein synthesis

Healthy root growth

Fruit ripening

Retarded plant growth

Solution

Question 4

Activation of enzymes

Photosynthesis

Sugar transport

Acting as enzyme cofactor

Solution

Question 5

Zinc

Phosphorus

Aluminium

Boron

Solution

Question 6

$$a-4, b-3, c-2, d-1$$

$$a-5, b-3, c-4, d-1$$

$$a-5, b-4, c-1, d-2$$

$$a-3, b-5, c-4, d-2$$

$$a-2, b-1, c-3, d-5$$

Solution

Question 7

Iron

Boron

Potassium

Molybdenum

Solution

Question 8

Translocation of solutions

Nitrate reduction

Tryptophan synthesis

Ascorbic acid synthesis

Solution

Question 9

Deep gree foliage

Early flowering

Yellowing of leaves

Loss of pigmentation in petals

Solution

Question 10

Knop

Went

Hill

Emerson

Solution

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