Mineral Nutrition Test

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Mineral Nutrition Test - 64

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements are correct?
(i) The deficiency of any element can cause multiple symptoms
(ii) Same symptoms may be caused by the deficiency of one or several different elements
(iii) The concentration of the essential element below which plant growth is retarded is termed as critical concentration
(iv) Chlorosis is the loss of chlorophyll due to deficiency of N, K, Mg, Fe, S, Mn, Zn, Mo.
(v) Different plants respond differently to the deficiency of the same element.

A
(i), (ii), (iii), (iv) and (v)

B
(i) and (iv)

C
(i) and (iii)

D
(iii) and (v)

Solution

(i) The deficiency of any element can have its effect on several parts of a plant and the part of the plant that gets affected depends upon the mobility of the element.
(ii), (iv)The same symptom may be shown by the deficiency of several different elements. E.g: chlorosis characterised by the yellowing of leaves may be caused by the deficiency of N, K, S, Fe, Mg, Mo, Mn and Zn.
(iii) Critical concentration is the concentration of the essential element below which plant growth is retarded.
(v) Different plants respond differently to the deficiency of the same nutrient. E.g: different plants within the same species or different species of plants react differently to low levels of phosphorus in soil.
So, the correct option is '(i), (ii), (iii), (iv) and (v)'.
Question 2
1 / -0

What is not true for Ammonification?

A
Carried out by saprophytic microbes

B
Organic nitrogen is converted in ammonia

C
Carried out by Bacillus ramosus bacteria

D
Protein are directly converted into ammonia without any intermediate
Solution
- Proteins and nucleic acids of the dead remains of plants, animals and excretory products of animals are degraded by microorganisms (e.g, Bacillus ramosus, B. vulgaris, Clostridium, Actinomyces, etc), with the liberation of ammonia. This process is called ammonification.
- The saprophytic bacteria will decompose the product of dead animals but not in the form of nitrogen compounds.
So the correct option is "Saprophytic microbes".
Question 3
1 / -0

If some solute is dissolved in pure water, its water potential _____________.

A
Remains samez

B
Increases

C
Decreases

D
First decreases then increases

Solution

The water potential of a solution can be determined using pure water as the standard of reference. The pure water, at atmospheric pressure, has a water potential of zero$$(0)$$. The addition of solute particles reduces the free energy of water and thus decreases the water potential(negative value). Because of this, the water potential of a solution is always less than zero.
So, the correct answer is 'Decreases'

Question 4

1 / -0

Many elements are found in living organisms either free or in the form of compounds. Which one of the following is not found in living organisms?

Silicon

Magnesium

Iron

Sodium

Solution

A comparison of elements present in non-living and living matter is given in the table below:

Elements	$$\%$$ weight of	$$\%$$ weight of
	Earth crust (non living matter)	Human body (living matter)
Hydrogen	0.14	0.5
Carbon	0.03	18.5
Oxygen	46.6	65.0
Nitrogen	very little	3.3
Sulphur	0.3	0.3
Sodium	2.8	0.2
Calcium	3.6	1.5
Magnesium	2.1	0.1
Silicon	27.7	negligible

Question 5
1 / -0

Best defined function of manganese in green plants is ________.

A
Photolysis of water

B
Calvin cycle

C
Nitrogen fixation

D
Water absorption
Question 6
1 / -0

Which of the following is not of the three plant macronutrients included in most fertilizers?

A
O

B
N

C
P

D
K
Question 7
1 / -0

Select the correct statement(s) regarding the solution culture techniques.

A
Successful hydroponic culture requires a large volume of nutrient solution or frequent adjustment of the nutrient solution to prevent roots from producing radical changes in nutrient concentrations and pH of the medium.

B
In nutrient film growth system, plant roots lie on the surface of a trough, and nutrient solutions flow in a thin layer along the trough over the roots.

C
In aeroponics technique, plants are grown with their roots suspended in air while being sprayed continuously with a nutrient solution.

D
All of these
Question 8
1 / -0

The technique of hydroponics was first demonstrated by ________.

A
M. Calvin (1961)

B
Julius Von Sachs (1860)

C
Arnon (1940)

D
Hoagland (1940)

Solution

In 1860 Julius von Sachs, Professor of Botany at the University of Wurzburg published the first standard formula for a nutrient solution that could be dissolved in water and in which plants could be successfully grown. The technique was termed “nutriculture”. Now it is called hydroponics.
So, the correct answer is option B.
Question 9
1 / -0

Which of the following is not a criterion for essentiality of an element?

A
Requirement of the element is specific.

B
Necessary for normal growth and reproduction.

C
Not replaceable by another element.

D
Indirectly involved in plant metabolism.

Solution

Arnon and Stout (1939) proposed criteria for knowing the essentiality of an element. There are:
(i) It is indispensable for the growth of plants.
(ii) The element is directly involved in the metabolism of plants.
(iii) A plant is unable to complete its vegetative or reproductive phase in the absence of the element.
(iv) The element cannot be replaced by any other element.
(v) The absence or deficiency of the element produces disorders. These disorders are a direct result of the lack or deficiency of the element.
So, the correct answer is 'Indirectly involved in plant metabolism'.
Question 10
1 / -0

Select the correctly matched pair.

A
Zinc - Helps to maintain the ribosome structure.

B
Magnesium - Needed during the formation of mitotic spindle.

C
Calcium - Plays a role in the opening and closing of stomata.

D
Manganese - Needed in the splitting of water to liberate oxygen during photosynthesis.

Solution

Manganese (Mn) is an essential micronutrient that while needed in small amounts, plays a key role in photosynthesis. Mn sparks the photosynthesis process by splitting water after photosystem II (PSII) fixes light to initiate the conversion of $$CO_2$$ and water into carbohydrates.
Hence, the correct answer is option D.

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Mineral Nutrition Test - 64

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Mineral Nutrition Test - 64

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Question 1

(i), (ii), (iii), (iv) and (v)

(i) and (iv)

(i) and (iii)

(iii) and (v)

Solution

Question 2

Carried out by saprophytic microbes

Organic nitrogen is converted in ammonia

Carried out by Bacillus ramosus bacteria

Protein are directly converted into ammonia without any intermediate

Solution

Question 3

Remains samez

Increases

Decreases

First decreases then increases

Solution

Question 4

Silicon

Magnesium

Iron

Sodium

Solution

Question 5

Photolysis of water

Calvin cycle

Nitrogen fixation

Water absorption

Question 6

O

N

P

K

Question 7

Successful hydroponic culture requires a large volume of nutrient solution or frequent adjustment of the nutrient solution to prevent roots from producing radical changes in nutrient concentrations and pH of the medium.

In nutrient film growth system, plant roots lie on the surface of a trough, and nutrient solutions flow in a thin layer along the trough over the roots.

In aeroponics technique, plants are grown with their roots suspended in air while being sprayed continuously with a nutrient solution.

All of these

Question 8

M. Calvin (1961)

Julius Von Sachs (1860)

Arnon (1940)

Hoagland (1940)

Solution

Question 9

Requirement of the element is specific.

Necessary for normal growth and reproduction.

Not replaceable by another element.

Indirectly involved in plant metabolism.

Solution

Question 10

Zinc - Helps to maintain the ribosome structure.

Magnesium - Needed during the formation of mitotic spindle.

Calcium - Plays a role in the opening and closing of stomata.

Manganese - Needed in the splitting of water to liberate oxygen during photosynthesis.

Solution

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