Mineral Nutrition | MCQs | NEET (Que 1-15 of 100)

 

 1.

 

... Answer is D)

2. 

... Answer is C)
Know Solution with explanation below.

3.

The first stable product of fixation of atmospheric nitrogen in leguminous plants is

1. ${\mathrm{NO}}_2^{-}$

2. ammonia

3. ${\mathrm{NO}}_3^{-}$

4. glutamate

... Answer is 2)

4. 

A nitrogen fixing microbe associated with Azolla in rice fields is

1. Spirulina 

2. Anabaena

3. Frankia

4. Tolypothrix

... Answer is 2)

5.

Nitrifying bacteria

1. convert free nitrogen to nitrogen compounds

2. convert proteins into ammonia

3. reduce nitrates to free nitrogen

4. oxidize ammonia to nitrates

... Answer is 4)

6.

An organism used as a biofertilizer for raising soyabean crop is

1. Azospirillum

2. Rhizobium

3. Nostoc

4. Azotobacter

... Answer is 2)

7. 

An element playing important role in nitrogen fixation is

1. molybdenum

2. copper

3. manganese

4. zinc

... Answer is 1)

8. 

The common nitrogen-fixer in paddy fields is

1. Rhizobium

2. Azospirillum

3. Oscillatoria

4. Frankia

... Answer is 2)

9.

Which of the folowing is a symbiotic nitrogen fixer?

1. Glomus

2. Azotobacter

3. Frankia

4. Azolla

... Answer is 3)

10. 

Farmers in a particular region were concerned that pre-mature yellowing of leaves of a

pulse crop might cause decrease in the yield. Which treatment could be most beneficial to

obtain maximum seed yield?

1. Frequent irrigation of the crop

2. Treatment of the palnts with cytokinins alongwith a small dose of nitrogenous fertilizer

3. Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5 

trichlorophenoxy acetic acid

4. Application of iron and magnesium to promote synthesis of chlorophyll

Page-197, XI NCERT

... Answer is 4)

11. Which is essential for the growth of root tip?

(1) Zn

(2) Fe

(3) Ca

(4) Mn

... Answer is 4)

12.

Select the mismatch.

(1) Frankia                       Alnus

(2) Rhodospirillium            Mycorrhiza

(3) Anabaena                   Nitrogen fixer

(4) Rhizobium                  Alfa-fa

... Answer is 2)

13.

How many ATP molecules are required to biologically fix one molecule of nitrogen into two molecules of ammonia?
1. 4
2. 8
3. 12
4. 16

... Answer is 4)

14. Identify the incorrectly matched pair

    Mineral                     Functions in plants

1. Potassium                 Opening and closing of stomata, Activation of enzymes

2. Magnesium                Maintenance of ribosome structure, Structure of chlorophyll

3. Boron                        Pollen germination, Carbohydrate translocation

4. Molybdenum               Water splitting in photosynthesis, Nitrogen

... Answer is 4)

15. 

The deficiency symptoms of iron, magnesium and calcium in plants may actually be due to the toxicity of
1. Potassium
2. Manganese
3. Iron
4. Chlorine

... Answer is 2)

Solutions with Explanation-

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