Auxins

Q. Match the following columns

	Column I		Column II
A	Auxin	1	Apical dominanc
B	Cytokinin	2	Shoot development
C	Gibberellin	3	Dormin
D	Abscisic acid	4	Parthenocarpy

1. $A-2,B-1,C-4,D-3$
2. $A-1,B-4,C-3,D-2$
3. $A-4,B-2,C-3,D-2$
4. $A-1,B-2,C-4,D-3$

Q.

Which of the following is the natural auxin found mainly in plants?

1. GA₃

2. IAA

3. Zeatin

4. IBA

Q.

What are gibberellins and mention any two functions of it?

Q.

Shoots of a plant bends towards the light because

1. Uniform occurrence of gibberellins

2. Inhibition of cytokinin synthesis

3. Unequal distribution of cytokinins and gibberellins

4. Unequal distribution of auxins

Q. Select the odd one out from the following hormones.

1. Auxin
2. Cytokinin
3. Gibberellin
4. Insulin

Q.

The term auxin was first coined by ________

1. Ernest Starling

2. Linus Pauling

3. E. W. Went

4. William Bayliss

Q.

The phenomenon of suppression of lateral buds by apical buds is called ______

1. Hetrozygosity

2. apical dominance

3. Homozygosity

4. lateral dominance

Q.

What are the functions of the following?

1)Auxins

2)Cytokinins

3)Abscisic Acid

4)Gibberellins

5)Ethylene

please fast, I have exams day after tomorrow

Q.

Which of the following hormone is concerned chiefly with root iniation?

1. IBA

2. GA3

3. ABA

4. Kinetin

Q.

Which among the following accelerates the growth in stem?

1. Auxin

2. Cytoxin

3. Vitamin

4. Enzyme

Q.

The curvature of shoot due to auxins during phototrophic movements occurs ______________.

1. Behind the shoot tip

2. Shady side of the shoot

3. Far away from the shoot tip

4. None of these

Q.

Auxins are a class of __.

1. plant hormones.

2. plant proteins.

3. plant enzymes.

4. plant vitamins.

Q.

Phyto hormones and thier functions

Why pancreas are both endocrine and exocrine system .exp

Q.

In majority of vascular plants, apical bud dominate over lateral buds.

1. True

2. False

Q.

This hormone is responsible for cell wall loosening or relaxation. This allows the cell wall to be stretched like a rubber when subjected to tension. Name the hormone.

1. Gibberellins

2. Auxin

3. Cytokinin

4. Ethylene

Q. In a plant body, where are auxins synthesised? Briefly explain how auxins help in bending of a plant stem towards light.​

Q. is used in producing parthenocarpic fruits.

1. Auxin
2. Cytokinin
3. Ethylene

Q.

Bending of stem towards the sunlight in plants is due to

1. Unequal distribution of auxins

2. Uniform occurrence of gibberellins

3. Inhibition of cytokinin synthesis

4. Unequal distribution of cytokinins and gibberellins

Q.

Which of the following effects of auxins on plants is the basis for its commercial application?

1. Induction of root formation in stem cuttings

2. All the above

3. Callus formation

4. Curvature of stem

Q.

What is the function of auxin, and gibberalins, cytokinin, absicic acid and ethene in plants.? How do they work??

Q.

Name the plant and animal hormone on the basis of function given below:

• Promotes cell division in plants…………….
  

Q.

Auxin induces apical dominance which is supression of apical buds.

1. IAA

2. GA

Q.

Match the items given in column A with most appropriate one in column B. Rewrite the correct matching pairs.

Column 1	Column 2
Parthenocarpy	Stimulus of contact
Apical dominance	2: 4- D
Weedicides	Formation of fruit without fertilisation
Thigmotropism	Growth temporarily stopped
Dormancy	Auxin

Q.

Name the plant hormone which promote cell division?

Q.

A : Auxins promote apical dominance by suppressing the lateral growth of axillary buds.

R : Periodic pruning of shoots in mulberry helps in making the shoots bushy.

1. A is correct, R is incorrect

2. A is incorrect, R is correct

3. A & R both are correct

4. A & R both are incorrect