Mineral Nutrition Test

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Mineral Nutrition Test - 80

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Weekly Quiz Competition

Question 1
1 / -0

Refer the given passage and answer the following question.

At present the primary nutrient which limits the agricultural yield is nitrogen (N), Some plants are capable to produce more N$$_2$$ than they consume. These plants show a symbiotic relationship with N$$_2$$ - fixing bacteria such as Rhizobium. These bacteria produce root nodules in leguminous plants and convert atmospheric N$$_2$$ is not nitrogenous compounds. Rhizobium bacteria are gram-negative bacteria. Which show host specificity and fix N$$_2$$ in the presence of a red pigment called leghaemoglobin. It protects nitrogen-fixing enzyme nitrogenase from oxygen.

Which of the following statements is incorrect?

A
Leghaemoglobin functions as oxygen scavenger during $$N_2$$ - fixation.

B
The enzyme nitrogenase, which is required to fix atmospheric $$N_2$$ is active in the presence as well as the absence of oxygen.

C
N, P, and K are referred to as critical elements for crop plants as they easily become deficient in soil due to higher plant requirement and repeated cultivation.

D
The coordinated activities of the legume and Rhizobium bacteria depends on the chemical interaction between the symbiotic partners.
Question 2
1 / -0

An association which fixes nitrogen through non-nodulation is

A
Maize roots with Spirillum notatum

B
Digitaria roots with Spirillum notatum

C
Coralloid roots of Cycas with Anabena

D
All of the above

Solution

Cycads form mutualistic, facultative symbioses with nitrogen fixing cyanobacteria (blue-green algae). Cycads provide fixed carbon and a stable environment to the cyanobacteria in exchange for fixed nitrogen. These cyanobacteria are endosymbionts, living within the roots of Cycads. Cyanobacteria within the coralloid roots of cycads are chemoheterotrophic. All cyanobacteria in symbiosis with cycads have the ability to fix nitrogen. Biologically fixed nitrogen makes up 90% of the nitrogen available globally for use by plants and animals.
Therefore, the correct answer is option C.
Question 3
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Criteria for essentiality in mineral nutrition were first shown by

A
Arnon

B
Liebig

C
Steward

D
Levitt

Solution

By the turn of the century, water and sand cultures were being used to study the mineral needs of plants under controlled conditions. In 1939, Arnon and Stout published the criteria for essentiality of a nutrient element. The criteria are as follows:
1) The element must be present in the plant for normal growth and completion of the life cycle.
2) The element is required specifically and cannot be replaced by another element.
3) The element must be directly involved in growth or metabolism.
Therefore, the correct answer is option A.
Question 4
1 / -0

Nitrogen, phosphorus, potassium are examples of

A
micro-nutrients

B
macronutrients

C
fertilizers

D
both (a) and (b)

Solution

Nitrogen, phosphorus and potassium are major nutrients also known as macronutrients. Plant uses large amount of them for their growth and survival. Nitrogen is required by plants in large quantities.
Question 5
1 / -0

Reclamation and little leaf disease is caused by deficiency of

A
Zn and Mo

B
Cu and Zn

C
Cu and B

D
Mn and Cu

Solution

Deficiency symptoms of zinc causes little leaf disease, leaf rosette, mottled leaf, interveinal chlorosis and necrosis.
Zinc is a mobile, micro mineral essential element. It is an activator for carboxylase. It is needed for the synthesis of auxins. It is absorbed in the form of $$Zn^{2+}$$
Deficiency disease of copper is die back disease of shoots in Citrus, necrosis of young leaf tips, exanthema, reclamation diseaase of cereals and legumes, blackening potato tubers.
Question 6
1 / -0

Single filament of Nostoc with mucilage sheath is called as

A
Colony

B
Mycelium

C
Trichome

D
Hyphae

Solution

Single unbranched filament of Nostoc is called as trichome. Trichome is covered with mucilage sheath. A trichome consist of vegetative cells and heterocyst joined end to end and form a beaded chain like appearance. Nostoc is a colonial cyanobacterium. It contains a number of interwined filaments on the periphery a mucilage filled hollow interior and a dense mucilage covering on the outside.
Therefore, the correct answer is option C.
Question 7
1 / -0

Which of the following is correct set of micronutrient for plants?

A
Mg, Si, Fe, Cu, Ca

B
Cu, Fe, Zn, B, Mn

C
Mg, Fe, Zn, B, Mn

D
Mo, Zn, CI, Mg, Ca

Solution

Chemical elements present only in minute amounts are micro-nutrients that are essential for the proper growth, development, and physiology of plants. Chromium, cobalt, copper (Cu), iron (Fe), manganese (Mn), magnesium, molybdenum, selenium, zinc (Zn), Boron (B) all are the example of trace elements or micronutrients.
Hence, option B is correct.
Question 8
1 / -0

Match the following and choose the correct combination.
List-A List-B
(A)Mg (i) Splitting of $$H_2O$$ during photosynthesis.
(B)Mo (ii) Germination of pollen grains.
(C)Mn (iii) Constituent of chlorophyll.
(D)B (iv) Component of nitrate reductase.

A
A- (ii), B- (v), C- (iv), D- (i)

B
A- (iii), B- (iv), C- (ii), D- (i)

C
A- (iii), B- (v), C- (iv), D- (i)

D
A- (iii), B- (iv), C- (i), D- (ii)

Solution

Chlorophyll is a green pigment present in the green parts of the plant that participates in the photosynthesis. It is a chelating agent that constitutes the magnesium as the central atom.
Nitrate reductases are the molybdoenzymes that converts nitrates into nitrites.
light induced catalytic water splitting during photosynthesis takes place in photosystem-2 complex. This complex is composed of four manganese atoms and one calcium atom.
Boron has a regulatory role in the germiration of pollen grain and pollen tube.

Question 9

1 / -0

	List I (Elements)		List II (Component co-factor)
(A)	Magnesium	(I)	Energy currency of the cell
(B)	Sulphur	(II)	Enzyme catalysing biological nitrogen
(C)	Phosphorous	(III)	Enzyme catalysing phosphorylation of glucose
(D)	Molybdenum	(IV)	Enzyme catalysing decarboxylation of oxalosuccinic acid
		(V)	Amino acid coded by AUG

Study the list and match the following.

(A)- (III), (B)- (V), (C)- (I), (D)- (II)

(A)- (V), (B)- (IV), (C)- (III), (D)- (II)

(A)- (II), (B)- (I), (C)- (V), (D)- (III)

(A)- (I), (B)- (III), (C)- (IV), (D)- (V)

Solution

In glycolysis, glucose is phosphorylated to glucose-6- phosphate in the presence of hexokinase. In this process ATP is synthesized in the presence of 'Magnesium ion.'

AUG is the start codon which codes for methionine. Methionine is an amino acid and sulphur is one of the component of methionine.

ATP is known as the energy currency of the cell. For the formation of ATP i. e., Adenosine Triphosphate, Phosphorous plays an important role which is added in the form of phosphate obtained from phosphoric acid.

Molybdenum functions as an electron carrier in those enzymes that catalyse the reduction of nitrogen and nitrate.

Thus, the correct answer is option A.

Question 10
1 / -0

Identify the role of lectins in the formation of root nodules in legumes.

A
Recognition of compatible Rhizobium by host.

B
Formation of peribacteroid membrane.

C
Formation of infection thread.

D
Formation of shepherd's crook.

Solution

Lectin is a carbohydrate-binding protein that participates in plant defense against predators and pathogens. It is also involved symbiotic interactions between host plants and symbiotic microbes, including mycorrhizal fungi and nitrogen-fixing rhizobia.
So, the correct answer is option A.

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Re-Attempt Weekly Quiz Competition

List-A	List-B
(A)Mg	(i) Splitting of $$H_2O$$ during photosynthesis.
(B)Mo	(ii) Germination of pollen grains.
(C)Mn	(iii) Constituent of chlorophyll.
(D)B	(iv) Component of nitrate reductase.

Mineral Nutrition Test - 80

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Mineral Nutrition Test - 80

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SHARING IS CARING

Question 1

Leghaemoglobin functions as oxygen scavenger during $$N_2$$ - fixation.

The enzyme nitrogenase, which is required to fix atmospheric $$N_2$$ is active in the presence as well as the absence of oxygen.

N, P, and K are referred to as critical elements for crop plants as they easily become deficient in soil due to higher plant requirement and repeated cultivation.

The coordinated activities of the legume and Rhizobium bacteria depends on the chemical interaction between the symbiotic partners.

Question 2

Maize roots with Spirillum notatum

Digitaria roots with Spirillum notatum

Coralloid roots of Cycas with Anabena

All of the above

Solution

Question 3

Arnon

Liebig

Steward

Levitt

Solution

Question 4

micro-nutrients

macronutrients

fertilizers

both (a) and (b)

Solution

Question 5

Zn and Mo

Cu and Zn

Cu and B

Mn and Cu

Solution

Question 6

Colony

Mycelium

Trichome

Hyphae

Solution

Question 7

Mg, Si, Fe, Cu, Ca

Cu, Fe, Zn, B, Mn

Mg, Fe, Zn, B, Mn

Mo, Zn, CI, Mg, Ca

Solution

Question 8

A- (ii), B- (v), C- (iv), D- (i)

A- (iii), B- (iv), C- (ii), D- (i)

A- (iii), B- (v), C- (iv), D- (i)

A- (iii), B- (iv), C- (i), D- (ii)

Solution

Question 9

(A)- (III), (B)- (V), (C)- (I), (D)- (II)

(A)- (V), (B)- (IV), (C)- (III), (D)- (II)

(A)- (II), (B)- (I), (C)- (V), (D)- (III)

(A)- (I), (B)- (III), (C)- (IV), (D)- (V)

Solution

Question 10

Recognition of compatible Rhizobium by host.

Formation of peribacteroid membrane.

Formation of infection thread.

Formation of shepherd's crook.

Solution

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