Mineral Nutrition Test

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Mineral Nutrition Test - 42

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following minerals are called as critical element for crops?

A
N, P, K

B
C, H, O

C
N, S, Mg

D
K, Ca, Fe

Solution

Plants require seventeen essential mineral elements. The essential mineral elements can be grouped into two classes based on the amount required. Macronutrients are the minerals required in large amount. The important macronutrients for plants are carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, magnesium, potassium, calcium.
The micronutrients required in lesser amount are zinc, copper, iron, manganese, nickel, molybdenum, chlorine and boron.
The macronutrients required in largest amount are nitrogen, phosphorous and potassium. These minerals are frequently deficient in soil and are hence called as critical elements.
Question 2
1 / -0

Who proposed the protein-lecithin theory?

A
Sachs

B
Lundegardh

C
Bose and Renner

D
Bennet and Clark

Solution

Protein - Lecithin as carrier was proposed by Bennet - Clark, who proposed, that the carrier can be a protein associated with a phosphatide e.g., lecithin, which carries both anions and cations and forms a lecithin ion complex. This moves to the inner side of membrane, releases the ion by hydrolysis forming phosphatidic acid and choline due to the action of the enzyme lecithinase. Lecithin is regenerated with the help of enzymes choline esterase and choline acetylase. This requires expenditure of metabolic energy.
So, the correct answer is option D.
Question 3
1 / -0

A plant requires magnesium for

A
Cell wall development

B
Holding cells together

C
Protein synthesis

D
Chlorophyll synthesis

Solution

Plants require seventeen essential mineral elements. The essential mineral elements can be grouped into two classes based on the amount required. Macronutrients are the minerals required in large amount. The important macronutrients for plants are carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, magnesium, potassium, calcium.
The micronutrients required in lesser amount are zinc, copper, iron, manganese, nickel, molybdenum, chlorine and boron.
Magnesium is a component of chlorophyll. Hence, it is required for chlorophyll biosynthesis. Other mineral element required for chlorophyll biosynthesis is iron.
Question 4
1 / -0

The mineral nutrient mainly concerning with apical meristematic activity is

A
K

B
Ca

C
N

D
S

Solution

Plants require seventeen essential mineral elements. The essential mineral elements can be grouped into two classes based on the amount required. Macronutrients are the minerals required in large amount. The important macronutrients for plants are carbon, hydrogen, oxygen, nitrogen, phosphorous, sulphur, magnesium, potassium, calcium.
The micronutrients required in lesser amount are zinc, copper, iron, manganese, nickel, molybdenum, chlorine and boron.
As calcium is a component of cell wall in plants, it is essential for the growth activity of meristematic cells. Calcium is also required for spindle formation during cell division. For this reason also calcium is an important requirement for meristematic cells at the apex.
Question 5
1 / -0

Gray spots of oat are caused by deficiency of

A
Cu

B
Zn

C
Mn

D
Fe

Solution

Manganese is a micronutrient required by leaves and seeds. It is an activator of enzymes, like carboxylases, oxidases, dehydrogenases and kinases. Deficiency symptoms of manganese are-
1. Causes grey spot disease in oat
2. Poor development of root system
3. Interveinal chlorosis occurs
So, the correct answer is 'Mn'
Question 6
1 / -0

Hydroponics is a technique in which plants are grown in a ?

A
Green house

B
Water saturated sand

C
Balanced nutrient solution

D
Purified distilled water

Solution

Hydroponics is the growth of plants in water culture having a balanced nutritional composition depending on the specific requirements of the plants grown. This may also be referred to as soil-less agriculture, test-tube farming, tank farming or chemical gardening.
Commercially, hydroponic cultures are maintained in large shallow concrete, cement wood or metal tanks in which gravel and nutrient solutions are taken. The tanks are provided with pumps and empty auxiliary tanks to pump out and circulate the growth solution and to maintain proper aeration of the nutrient solution.
The technique of hydroponics is employed to know which mineral element is essential for the growth and development of the plant. Commercially the application of hydroponics involves the production of horticultural and floricultural crops.
This method may be used to increase the yield of ornamentals, such as gladioli, snapdragon, roses and vegetables, such as carrot, radish, potatoes, tomatoes and lettuce.
So, the correct answer is 'Balanced nutrient solution'
Question 7
1 / -0

Human-caused changes to the nitrogen cycle are expected to result in

A
An increase in acid rain.

B
An increase in the loss of species from ecosystems.

C
Higher concentrations of a greenhouse gas.

D
All ofthe above
Question 8
1 / -0

How is nitrogen utilised by living organisms?

A
$$NO^{3-}$$

B
$$NH^{4+}$$

C
$$N_2$$

D
Both (A) and (B)
Question 9
1 / -0

Which one of the following mineral elements plays an important role in biological nitrogen fixation?

A
Copper

B
Manganese

C
Zinc

D
Molybdenum

Solution

Plants do not use atmospheric nitrogen directly. They absorb fixed nitrogen, i.e., nitrogen in the form of compounds like nitrate, nitrite and ammonium ions. Molybdenum has an important role to play in the metabolism of nitrogen. It affects the synthesis of ascorbic acid. It activates the enzymes involved in nitrogen metabolism. Deficiency symptoms of molybdenum are
i. It leads to mottling and wilting of leaves at the margins, causing yellow spot disease of citrus.
ii. Whiptail disease in cauliflowers causing narrowing of leaf blades and their rugged appearance due to distortion.
Question 10
1 / -0

Which of the following contribute to nitrogen availability in the soil?

A
Decay of wastes from excretion and dead bodies

B
Lightning in the atmosphere

C
Nitrogen fixing bacteria and blue green algae

D
All of the above
Solution
- Nitrogen present in plants and animals undergo decay by denitrificans and gets absorbed into the soil.
- During lightning and thunders nitrogen gets fixed into the soil.
- Atmospheric nitrogen is fixed through fixation by bacteria and blue green algae in the soil.
Thus, option D, all of the above is correct.

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Mineral Nutrition Test - 42

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Mineral Nutrition Test - 42

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SHARING IS CARING

Question 1

N, P, K

C, H, O

N, S, Mg

K, Ca, Fe

Solution

Question 2

Sachs

Lundegardh

Bose and Renner

Bennet and Clark

Solution

Question 3

Cell wall development

Holding cells together

Protein synthesis

Chlorophyll synthesis

Solution

Question 4

K

Ca

N

S

Solution

Question 5

Cu

Zn

Mn

Fe

Solution

Question 6

Green house

Water saturated sand

Balanced nutrient solution

Purified distilled water

Solution

Question 7

An increase in acid rain.

An increase in the loss of species from ecosystems.

Higher concentrations of a greenhouse gas.

All ofthe above

Question 8

$$NO^{3-}$$

$$NH^{4+}$$

$$N_2$$

Both (A) and (B)

Question 9

Copper

Manganese

Zinc

Molybdenum

Solution

Question 10

Decay of wastes from excretion and dead bodies

Lightning in the atmosphere

Nitrogen fixing bacteria and blue green algae

All of the above

Solution

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