Question 1

Which one of the following is not an essential mineral element for plants while the remaining three are?

Accepted Answer

Correct answer is A

Question 2

In plant nutrition elements are classified as major or minor depending on:

Accepted Answer

Major elements are required by plants in quantity of more than 1 milligram/gram dry matter and minor elements are required in quantity of less than 1 milligram/gram of dry matter.

Question 3

Inorganic nutrients are present in the soil in the form of:

Accepted Answer

Correct answer is C

Question 4

Sulphur is an important nutrient for optimum growth and productivity in:

Accepted Answer

Correct answer is B

Question 5

An essential element is one:

Accepted Answer

An essential element is the one which has a specific structural or physiological role and without which plants cannot complete their life cycle.

Question 6

Hydroponics is:

Accepted Answer

In 1860, Julius von Sachs, a prominent German botanist, demonstrated, for the first time, that plants could be grown to maturity in a defined nutrient solution in complete absence of soil. This technique of growing plants in a nutrient solution is known as hydroponics. Since then, a number of improvised methods have been employed to try and determine the mineral nutrients essential for plants. The essence of all these methods involves the culture of plants in a soil-free, defined mineral solution. These methods require purified water and mineral nutrient salts.

Question 7

Which of the following ions of heavy metals participate in process of photosynthesis in higher plants?

Accepted Answer

Correct answer is D

Question 8

Necrosis means:

Accepted Answer

Necrosis is death of cells of an area which therefore, becomes discoloured.

Question 9

Tracer elements are:

Accepted Answer

Tracer elements are radioactive isotopes of elements, which are used to detect various metabolic pathways in plants e.g., C14,N15,P32,S35 etc.

Question 10

Essential elements for plants are:

Accepted Answer

Correct answer is D

Question 11

In hydrophytic plants, water and salts are absorbed by:

Accepted Answer

Correct answer is D

Question 12

The number of essential elements required for normal growth of plant is:

Accepted Answer

Correct answer is B

Question 13

Aeroponic is also called as:

Accepted Answer

Aeroponic plants are grown with their roots bathed in nutrient mist. This method has been successfully used in growing Citrus and olive plants.

Question 14

Who gave the criteria of essentiality?

Accepted Answer

Criteria for essentiality of elements were first of all given by Arnon.

Question 15

Which element forms part of structure of chlorophyll molecule?

Accepted Answer

Mg is present in centre of chlorophyll molecule head.

Question 16

Deficiency symptoms of nitrogen and potassium are visible first in:

Accepted Answer

N and K are mobile elements.

Question 17

Which of the following is not caused by deficiency of mineral nutrition?

Accepted Answer

Correct answer is D

Question 18

Cultivation by sand culture is also called?

Accepted Answer

Mg is an important constituent of chlorophyll molecule where it occupies a central position and essential for photosynthesis and Fe plays an important role in ETS, photosynthesis and respiration because iron is the part of cytochromes. It is also essential for chlorophyll synthesis.

Question 19

Which of the following is associated with electron transport in photosynthesis?

Accepted Answer

According to Webster (1953) potassium is activator of more than 40 enzymes connected with phosphorylation, photosynthesis, starch synthesis, respiration, synthesis of chlorophyll, DNA and proteins.

Question 20

Which element forms part of structure of chlorophyll molecule?

Accepted Answer

Mg is chief element of chlorophyll molecule.

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Solution for Class 11, Biology, Mineral Nutrition

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