Select the mismatch:

Column I Column II
1. Rhodospirillum Mycorrhiza
2. Anabaena Nitrogen fixer
3. Rhizobium Alfalfa
4. Frankia Alnus

Subtopic:  Nitrogen Fixation |
 75%
From NCERT
NEET - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statements is correct?

(a) The deficiency of any element can cause multiple symptoms.

(b) The same symptoms may be caused by the deficiency of one of several different elements.

(c) The concentration of the essential below which plant growth is retarded is termed as critical concentration.

(d) Chlorosis is the loss of chlorophyll due to the deficiency of N, K, Mg, Fe, S, Mn, Zn, and Mo.

(e) Different plants respond differently to the deficiency of the same element.

(1) All of these

(2) Only (a) and (d)

(3) Only (a) and (c)

(4) Only (c) and (d)

Subtopic:  Mineral Deficiency & Toxicity |
 82%
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NEET 2023 - Target Batch - Aryan Raj Singh
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How many of the statement(s) given below is/are correct about the fate of ammonia in plants?

(a) At physiological pH, ammonia is protonated to form ammonium ion which cannot be stored as it is toxic.
(b) Most plants can assimilate ammonium ion as well as nitrate ion.
(c) The assimilation of ammonia can take place by reductive amination as well as transamination.
(d) Transport of fixed nitrogen in the form of amides and ureides takes place via xylem vessel.

1. 4

2. 3

3. 2

4. 1

Subtopic:  Ammonia Assimilation & Nitrogen Export |
From NCERT
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How many of the following statements is/are correct?

(1) Both Rhizobium and Frankia are free-living in soil and can fix N2 only under symbiotic condition.

(2) Root nodules can be best observed before flowering

(3) The formation of root nodules takes place as a result of the division of cortical and pericycle cells.

(4) When Rhizobium is free living it is aerobic but when it is symbiont it becomes anaerobic to protect Mo-Fe protein. Options :

(1) 4

(2) 3

(3) 2

(4) 1

Subtopic:  Nitrogen metabolism |
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Select the mismatch.

(1) Frankia                      Alnus

(2) Rhodospirillium            Mycorrhiza

(3) Anabaena                   Nitrogen fixer

(4) Rhizobium                 Alfa-fa

Subtopic:  Nitrogen Fixation |
 76%
From NCERT
NEET - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Match the following element with proper function

  Column-l                                                 Column-ll

a. S                                                        (i) Metabolism of urea

b. Mn                                                     (ii) Nodule formation

c. Ca                                                      (iii) Photolytic evolution of oxygen

d. Ni                                                      (iv) Organisation of mitotic spindle

1. a(iii), b(ii), c(iv), d(i)

2. a(ii), b(iii), c(iv), d(i)

3. a(iii), b(ii), c(i), d(iv)

4. a(ii), b(i), c(iii), d(iv)

 

Subtopic:  Mineral Function |
 87%
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Which one of the following pairs is wrongly matched?

1. Delayed flowering                         -    N, S, Mo

2. Inhibition of cell division                -    Ca, Mo, Cu

3. Components of biomolecules          -    C, H, O, N

 and cell

4. Components of energy                   -    Mg, p  

-related molecules 

Subtopic:  Mineral Deficiency & Toxicity |
 88%
From NCERT
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A : The N2+-- fixing bacteria become anaerobic during fixing events.

R : The enzyme nitrogenase is highly sensitive to the molecular oxygen.

1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark(1).

2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2).

3. If Assertion is true statement but reason is false, then mark (3).

4. If both Assertion and Reason are false statements, then mark (4).

Subtopic:  Nitrogen Fixation |
 87%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Match the following concerning essential elements and their functions in plants:

Column I Column II
(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
Select the correct option:
(a) (b) (c) (d)
1. (iv) (iii) (ii) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (i) (ii) (iii)
4. (ii) (i) (iv) (iii)
Subtopic:  Mineral Function |
 73%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Match the following concerning essential elements and their functions in plants :

(a) Iron (i) Photolysis of water
(b) Zinc (ii) Pollen germination
(c) Boron (iii) Required for chlorophyll biosynthesis
(d) Manganese (iv) IAA biosynthesis
 

Select the correct option:

(a) (b) (c) (d)
1. (iv) (iii) (ii) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (i) (ii) (iii)
4. (ii) (i) (iv) (iii)
Subtopic:  Mineral Function |
 76%
From NCERT
NEET - 2020
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh