Assertion: 2, 4-D is artificial auxin 
Reason: 2, 4-D is a weedicide and quickly kills mature monocots 
1. If both assertion and reason are true and the reason is the correct explanation of the assertion 
2. If both assertion and reason are true but the reason is not the correct explanation of the assertion 
3. If assertion is true but reason is false 
4. If both assertion and reason are false statements
 
Subtopic:  Auxin Function |
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Assertion (A) : Ethylene helps the plants to increase their absorption surface.
Reason (R) : It promotes root growth and root hair formation. 

1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion and (R) are true but (R)is not the correct explanation of (A)
3. (A) is true but (R) is false 
4. Both (A) and (R) are false statements

Subtopic:  Ethylene |
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A : Breaking of seed dormancy by giving cold treatment to seedling in presence of air is vernalisation. 

B : Vernalisation increases vegetative growth period to bring early flowering. 

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:  Vernalization |
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A : Ethephon hastens fruit ripening in tomatoes.

R : Ethephon releases ethylene readily.

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:  Ethylene |
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A: In coriander, the leaves of juvenile plants are different in shape from those in mature plants.

R: It shows environmental plasticity.

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 a true statement but the reason is false, then mark (3).

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

Subtopic:  Development |
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Assertion (A) : Promotion of flowering by a period of low temperature is called vernalisation.
Reason (R) : Vernalisation prevents precocious reproductive development.

1. Both (A) and reason are true and (R) is the correct explanation of (A)
2. Both (A) assertion and (R) are true but (R)is not the correct explanation of (A)
3. (A) is true but (R) is false 
4. Both (A) and (R) are false statements

Subtopic:  Vernalization |
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A: 2,4-D is widely used as an herbicide.

R: It is used to kill mature monocotyledonous plants.

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 a true statement but the reason is false, then mark (3).

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

Subtopic:  Auxin Function |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology

Match the Following:

Column I

Column II

A. IAA

B. ABA

C. Ethylene

D. GA

E. Cytokinin

1. Herring sperm DNA.

2. Bolting

3. Stomatal closure

4. Weed-free lawns

5. Ripening of fruits.

Codes

          A          B          C          D           E

1)       4          3          5          2           1

2)       5          3          4          2           1

3)       4          1          4          3           2

4)       5          3          2          4           4

 

Subtopic:  Auxin Function | Gibberellin | Cytokinin | Ethylene | Abscisic Acid |
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Which one of the following pairs, is not correctly matched?

1. IAA – Cell wall elongation

2. Abscissic acid – Stomatal closure

3. Gibberellic acid – Leaf fall

4. Cytokinin – Cell division

Subtopic:  Gibberellin | Ethylene |
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Which one of the following pairs, is not correctly matched?
1. Abscisic acid - Stomatal closure
2. Gibberellic acid - Leaf fall
3. Cytokinin - Cell division
4. IAA - Cell wall elongation

Subtopic:  Gibberellin |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology