Mineral Nutrition Test

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Mineral Nutrition Test - 57

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Weekly Quiz Competition

Question 1
1 / -0

Criteria of essentiality of nutrients in plants were given by ______.

A
Stahl $$(1923)$$

B
Benedict $$(1927)$$

C
Arnon $$(1938)$$

D
Sachs $$(1860)$$
Question 2
1 / -0

Which of the following is not a role played by Potassium in plant growth?

A
Translocation of carbohydrates

B
Maintaining anion-cation balance

C
Opening and closing of stomata

D
Synthesis of proteins

E
Maintaining turgidity of cells
Question 3
1 / -0

Which one is essential for nitrogen fixation?

A
Copper

B
Zinc

C
Manganese

D
Molybdenum

Solution

Nitrogen fixation is the process of conversion of atmospheric nitrogen into salts of nitrogen which can be easily used by the plants. It takes place in presence of an enzyme known as nitrogenase enzyme. It is produced by certain cyanobacteria and helps in the reduction of nitrogen to ammonia. It is made up of two component dinitrogenase and dinitrogenase reductase. The dinitrogenase contains a cofactor of iron and molybdenum which helps in reduction of nitrogen to ammonia.
So, the correct answer is option D.
Question 4
1 / -0

Plants deficient of zinc show reduced biosynthesis of growth hormone

A
Cytokinin

B
Auxin

C
Abscisic acid

D
Ethylene

Solution

Auxin is a growth hormone which is synthesized by tryptophan as a precursor by tryptophan-dependent auxin biosynthesis pathway. Zinc helps in the biosynthesis of auxin and its oxidative attack by free radical. It suppresses the production of oxygen during the synthesis of auxin and also acts as a coenzyme and activates the enzyme for auxin formation.
So, the correct answer is option B.
Question 5
1 / -0

Major function of mineral magnesium is

A
Formation of bones

B
Maintenance of acid-base balance

C
Storing of energy

D
Activator of enzymes

Solution

(A) A major function of mineral calcium is the formation of bones.
(B) The major function of mineral zinc is the maintenance of acid-base balance.
(C) The major function of mineral Phosphorus is the storing of energy.
(D) The major function of mineral Magnesium is the activation of the enzyme.
So, the correct answer is 'Activator of enzymes'.
Question 6
1 / -0

Which of the following gene is responsible for biological nitrogen-fixation?

A
Nitrogenase

B
Nif gene

C
RNA synthetase

D
Yeast alanine tRNA synthetase

Solution

Nif genes are the nitrogen-fixing gene which encodes for proteins that are involved in nitrogen fixation. Nitrogenase complex is the primary enzyme which is encoded by nif genes. It also encodes the regulatory protein involved in the nitrogen fixation. It is found in both free-living and symbiotic nitrogen fixers. The gene is inserted to plant which are deficient by the technique of nif gene cloning.
So, the correct answer is option B.
Question 7
1 / -0

Etiolation is characterised by

A
Slender yellowish stems

B
Small yellowish leaves

C
Subterminal hook

D
All the above

Solution

Etiolation is a process which is seen in flowering plants that are grown in partial or complete absence of light. It is characterized by slender yellowish stems, smaller yellowish leaves due to longer internodes, suberminal hook and chlorosis due to lack of chlorophyll. The growing tips are attracted towards light and will elongate towards it.
Thus, the correct answer is option D.
Question 8
1 / -0

Minerals that activate respiratory enzymes

A
N and P

B
Mg and Mn

C
K and Ca

D
S and Fe

E
Cu and Bo
Question 9
1 / -0

Metabolic water is the one

A
Used during transamination

B
Used during photosynthesis

C
Produced during aerobic utilization of glucose

D
Produced during condensation or polymerisation
Question 10
1 / -0

Ferrodoxin contains

A
Mg

B
Co

C
Iron

D
Nitrite

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Re-Attempt Weekly Quiz Competition

Mineral Nutrition Test - 57

Result

Mineral Nutrition Test - 57

Score

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Rank

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SHARING IS CARING

Question 1

Stahl $$(1923)$$

Benedict $$(1927)$$

Arnon $$(1938)$$

Sachs $$(1860)$$

Question 2

Translocation of carbohydrates

Maintaining anion-cation balance

Opening and closing of stomata

Synthesis of proteins

Maintaining turgidity of cells

Question 3

Copper

Zinc

Manganese

Molybdenum

Solution

Question 4

Cytokinin

Auxin

Abscisic acid

Ethylene

Solution

Question 5

Formation of bones

Maintenance of acid-base balance

Storing of energy

Activator of enzymes

Solution

Question 6

Nitrogenase

Nif gene

RNA synthetase

Yeast alanine tRNA synthetase

Solution

Question 7

Slender yellowish stems

Small yellowish leaves

Subterminal hook

All the above

Solution

Question 8

N and P

Mg and Mn

K and Ca

S and Fe

Cu and Bo

Question 9

Used during transamination

Used during photosynthesis

Produced during aerobic utilization of glucose

Produced during condensation or polymerisation

Question 10

Mg

Co

Iron

Nitrite

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