Mineral Nutrition Test

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Mineral Nutrition Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

Conversion of ammonia to nitrite by microbe is?

A
Nitrification

B
Nitrogen fixation

C
Eutrophication

D
Denitrification

Solution

Nitrification is the process of converting ammonia first into nitrite and into nitrate. In this process, ammonia is first oxidized to nitrite by the bacteria Nitrosomonas and Nitrococcus. The nitrite is further oxidized to nitrate by Nitrobacter.
So the correct answer is 'Nitrification'.

Question 2

1 / -0

Identify the correct matches.

	Column I		Column II		Column III
(a)	Calcium	I	Required for ionic balance	(i)	Grey blot
(b)	Boron	II	Essential for the constitution of nucleic acid	(ii)	Fruit with decreases
(c)	Phosphorus	III	Required for absorption of Ca	(iii)	Red blot leaves
(d)	Chlorine	IV	Required to activate respiratory enzymes	(iv)	Fruit and diminishes
(e)	Manganese	V	Required for synthesis of bipolar spindle	(v)	Young and tips begin to die

a - V - v, b - III - iv, c - II - iii, d - I - ii, e - IV - i

a - I - iv, b - II - v, c - III - iii, d - IV - i, e - V - ii

a - V - v, b - IV - iv, c - III - i, d - II - iii, e - I - ii

a - IV - iii, b - I - iv, C - V - v, d - III - ii, e - II - i

Solution

a) Calcium - It is required for synthesis of the cell wall, mitotic spindle and organisation of chromosome. Due to its deficiency, young tips begin to die.

b) Boron - It is required for uptake and utilisation of Ca++. It's deficiency cause death of meristem and reduced fertility in the plant.

c) Phosphorus - It is a constituent of the cell membrane, proteins, nucleotides, nucleic acids, ATP and nucleoproteins in the plant. Its deficiency can cause red blot leaves.

d) Chlorine - It is required for anion-cation balance in plants. It's deficiency cause wilting and chlorosis.

e) Manganese - It is required to activate respiratory enzymes. Its deficiency can cause grey blot in the plant.

So the correct answer is 'a-V-v, b-III-iv, c-II-iii, d-I-ii, e-IV-i'.

Question 3
1 / -0

Which micronutrient activates enzyme urease involved in nitrogen metabolism?

A
Boron

B
Molybdenum

C
Zinc

D
Nickel

Solution

Nickel is a micronutrient and absorbed from the soil as divalent cation from the soil. It is mainly required in roots and leaves in the plant. It is an important component of two enzymes, urease and hydrogenase. Also, it is involved in the metabolism of urea.
So the correct answer is 'Nickel'.
Question 4
1 / -0

Match the columns.
I II
a Photolysis of water (i) Zinc
b Diazotrophy (ii) Copper
c Cytochrome c oxidase (iii) Manganese
d Biosynthesis of IAA (iv) Molybdenum
(v) Boron

A
a-iii, b-iv, c-ii, d-i

B
a-v, b-ii, c-iii, d-iv

C
a-iii, b-ii, c-i, d-iv

D
a-iv, b-i, c-iii, d-ii

Solution

Manganese - It is absorbed in the form of manganous ions from the soil. It plays important role in the splitting of water to liberate oxygen, during photosynthesis.
Molybdenum - Plant absorbed it in the form of molybdate ions from the soil. It is essential for nitrogen-fixation i.e. diazotrophy.
Copper - Plant absorb it from the soil as cupric ions. It is associated with certain enzymes involved in redox reaction for e.g. cytochrome c oxidase.
Zinc - Plant absorb zinc from the soil as zinc ions. It activates enzymes like carboxylase. It is required for the synthesis of auxin i.e. IAA.
So the correct answer is 'a-iii, b-iv, c-ii, d-i'.
Question 5
1 / -0

What is required for nitrogen fixation by Rhizobium?

A
$$CO_2$$

B
$$O_2$$

C
Heterocyst

D
Potassium

Solution

Nitrogen fixing requires anaerobic conditions. Oxygen irreversibly inactivates the nitrogenase enzymes involved in nitrogen fixation and hence, nitrogen must be fixed under anaerobic conditions. Rhizobium functions under anaerobic conditions or can create an internal anaerobic environment in the presence of oxygen. Nodules contain an oxygen-binding heme protein called leghemoglobin. Leghemoglobin is present in the cytoplasm of infected nodule cells at high concentrations and it has a high affinity for oxygen.
Thus, the correct answer is option (B).
Question 6
1 / -0

'X' is an essential micronutrient required in leaves and roots. The major function of 'X' is to perform the metabolism of urea and ureids and its deficiency causes leaf tip necrosis. X is:

A
Sulphur

B
Magnesium

C
Zinc

D
Nickel

Solution

Nickel is a micronutrient. It is absorbed by the plant from the soil as a divalent ion. It is a component of two enzymes, urease and hydrogenase. It is involved in the metabolism of urea. Its deficiency cause chlorosis, necrosis and stunted plant growth.
So the correct answer is 'NIckel'.

Question 7

1 / -0

Match the column (I) of minerals, column (II) of functions and column (III) of relative percentage and select proper option.

I	II	III
(L) Phosphorus	(P) For photosynthesis and ionic balance	(i) 6%
(M) Magnesium	(Q) In structure of RNA, DNA and ATP	(ii) 8%
(N) Chlorine	(R) Structural component of chlorophyll	(iii) 0.2%
(O) Boron	(S) Absorption and utilisation of calcium	(iv) 0.3%

L-Q-ii, M-R-iii, N-P-i, O-S-iv

L-Q-i, M-R-ii, N-P-iii, O-S-iv

L-R-i, M-Q-ii, N-S-iii, O-P-iv

L-Q-i, M-Q-ii, N-P-iv, O-S-iii

Solution

Phosphorus - It is a constituent of RNA, DNA and ATP. Its amount is 6%.

Magnesium - It is structural component of chlorophyll. Its amount is 8%.

Clororine - It is involved in photosynthesis and ionic balance in cell. Its amount is 0.2%.

Boron - It helps in absorption and utilisation of calcium. Its amount is 0.3%.

So the correct answer is 'L-Q-i, M-R-ii, N-P-iv, O-S-iii'.

Question 8
1 / -0

Study the following statements and choose the correct option.
(i) Sulphur is present in two amino acids - cysteine and valine
(ii) Lower level of N, K, S, and Mo causes inhibition of cell division
(iii) Microbe that produces nitrogen fixing in the roots of non-leguminous plant Alnus is Frankia
(iv) Denitrification is carried by bacteria Nitrosomonas and Nitrobacter.

A
i and ii alone are correct

B
i and iii alone are correct

C
ii and iii alone are correct

D
ii and iv alone are correct

E
i and iv alone are correct

Solution

a) Sulphur is constituent of two amino acid - methionine and cysteine.
b) The lower level of N, K, S and Mo cause inhibition of cell division.
c) Frankia is free-living microbe fix atmospheric nitrogen in the roots of non-leguminous plant like Alnus.
d) Denitrification is carried by bacteria Nitrosomonas and Thiobacillus.
So the correct answer is 'ii and iii alone are correct'.
Question 9
1 / -0

In above diagram of metabolic Reaction what is the compound $$B$$?

A

$$B -$$ Oxaloacetic acid

B

$$B -$$ a Ketoglutaric acid

C

$$B - $$Pyruvic acid

D

$$B - Acetyl\ Co - A$$
Question 10
1 / -0

Choose the correct answer from the alternatives given.
In plants a common symptom caused by deficiencies of Ca, K, Mg and P is the:

A
appearance of a dead necrotic area

B
poor development of vasculature

C
bending of the leaf tip

D
formation of carotenes in plenty

Solution

Deficiency symptoms of Ca, K, Mg and P appear initially as localized tissue necrosis leading to stunted plant growth, necrotic leaf margins on young leaves or curling of the leaves, and eventual death of terminal buds and root tips.
So the correct answer is "appearance of a dead necrotic area".

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Re-Attempt Weekly Quiz Competition

	I		II
a	Photolysis of water	(i)	Zinc
b	Diazotrophy	(ii)	Copper
c	Cytochrome c oxidase	(iii)	Manganese
d	Biosynthesis of IAA	(iv)	Molybdenum
		(v)	Boron

Mineral Nutrition Test - 83

Result

Mineral Nutrition Test - 83

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Question 1

Nitrification

Nitrogen fixation

Eutrophication

Denitrification

Solution

Question 2

a - V - v, b - III - iv, c - II - iii, d - I - ii, e - IV - i

a - I - iv, b - II - v, c - III - iii, d - IV - i, e - V - ii

a - V - v, b - IV - iv, c - III - i, d - II - iii, e - I - ii

a - IV - iii, b - I - iv, C - V - v, d - III - ii, e - II - i

Solution

Question 3

Boron

Molybdenum

Zinc

Nickel

Solution

Question 4

a-iii, b-iv, c-ii, d-i

a-v, b-ii, c-iii, d-iv

a-iii, b-ii, c-i, d-iv

a-iv, b-i, c-iii, d-ii

Solution

Question 5

$$CO_2$$

$$O_2$$

Heterocyst

Potassium

Solution

Question 6

Sulphur

Magnesium

Zinc

Nickel

Solution

Question 7

L-Q-ii, M-R-iii, N-P-i, O-S-iv

L-Q-i, M-R-ii, N-P-iii, O-S-iv

L-R-i, M-Q-ii, N-S-iii, O-P-iv

L-Q-i, M-Q-ii, N-P-iv, O-S-iii

Solution

Question 8

i and ii alone are correct

i and iii alone are correct

ii and iii alone are correct

ii and iv alone are correct

i and iv alone are correct

Solution

Question 9

$$B -$$ Oxaloacetic acid

$$B -$$ a Ketoglutaric acid

$$B - $$Pyruvic acid

$$B - Acetyl\ Co - A$$

Question 10

appearance of a dead necrotic area

poor development of vasculature

bending of the leaf tip

formation of carotenes in plenty

Solution

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