Botany-2

Question 1

What is the primary function of plant hormones?

Answer 1

To regulate plant growth and development.

Question 2

True or False: Auxins are responsible for cell elongation.

Answer 2

True

Question 3

Fill in the blank: The hormone that promotes fruit ripening is called _____ .

Answer 3

Ethylene

Question 4

What are the five main classes of plant hormones?

Answer 4

Auxins, Gibberellins, Cytokinins, Abscisic Acid, Ethylene.

Question 5

Which hormone is known for promoting seed germination?

Answer 5

Gibberellins

Question 6

True or False: Cytokinins promote cell division.

Answer 6

True

Question 7

What effect do auxins have on apical dominance?

Answer 7

They promote apical dominance by inhibiting lateral bud growth.

Question 8

Which plant hormone is associated with stress responses?

Answer 8

Abscisic Acid

Question 9

Multiple choice: Which hormone is primarily involved in the elongation of stems? A) Cytokinins B) Auxins C) Abscisic Acid

Answer 9

B) Auxins

Question 10

What role do gibberellins play in flowering?

Answer 10

They promote flowering in certain plants.

Question 11

Fill in the blank: _____ are used in agriculture to promote uniform fruit ripening.

Answer 11

Ethylene

Question 12

Which hormone helps in the regulation of stomatal closure?

Answer 12

Abscisic Acid

Question 13

True or False: Ethylene is a gas at room temperature.

Answer 13

True

Question 14

What is the main effect of cytokinins in plants?

Answer 14

They promote cell division and shoot formation.

Question 15

Multiple choice: What is the effect of auxins on root growth? A) Promote A) Inhibit B) No effect

Answer 15

A) Promote

Question 16

What is the process of apical dominance?

Answer 16

The phenomenon where the main stem grows more strongly than the side stems.

Question 17

Fill in the blank: Gibberellins are involved in _____ and seed dormancy.

Answer 17

breaking

Question 18

Which hormone is often used to delay senescence in cut flowers?

Answer 18

Cytokinins

Question 19

True or False: Auxins can promote the development of fruit without fertilization.

Answer 19

True

Question 20

What are the effects of abscisic acid on plant growth?

Answer 20

It inhibits growth and promotes dormancy.

Question 21

Multiple choice: Which hormone is synthesized in response to environmental stress? A) Gibberellins B) Auxins C) Abscisic Acid

Answer 21

C) Abscisic Acid

Question 22

What is the primary site of auxin production in plants?

Answer 22

The apical meristem.

Question 23

Fill in the blank: _____ is the hormone responsible for leaf abscission.

Answer 23

Ethylene

Question 24

True or False: Cytokinins are synthesized in roots and transported to other parts of the plant.

Answer 24

True

Question 25

What is the role of gibberellins in stem elongation?

Answer 25

They promote cell elongation and division.

Question 26

Multiple choice: Which hormone is known to stimulate the growth of lateral roots? A) Ethylene B) Gibberellins C) Auxins

Answer 26

C) Auxins

Question 27

What is the relationship between auxins and phototropism?

Answer 27

Auxins cause the plant to bend toward light by promoting cell elongation on the side away from the light.

Question 28

Fill in the blank: _____ is often referred to as the 'stress hormone' in plants.

Answer 28

Abscisic Acid

Question 29

True or False: Ethylene promotes leaf senescence.

Answer 29

True

Question 30

What is the function of gibberellins in fruit development?

Answer 30

They promote growth and development of fruits.

Question 31

Multiple choice: Which hormone is primarily responsible for cell differentiation? A) Cytokinins B) Ethylene C) Auxins

Answer 31

A) Cytokinins

Question 32

What is the role of auxins in herbicide action?

Answer 32

They disrupt plant growth by causing uncontrolled cell elongation.

Question 33

Fill in the blank: _____ is produced in response to light and gravity.

Answer 33

Auxins

Question 34

True or False: Gibberellins can break seed dormancy.

Answer 34

True

Question 35

What effect does ethylene have on fruit ripening?

Answer 35

It accelerates the ripening process.

Question 36

Multiple choice: Which hormone is used in tissue culture to promote shoot formation? A) Gibberellins B) Cytokinins C) Abscisic Acid

Answer 36

B) Cytokinins

Question 37

What is the primary function of abscisic acid in plants?

Answer 37

To regulate water loss and stress responses.

Question 38

Fill in the blank: Auxins are often used in _____ to propagate plants.

Answer 38

rooting hormones

Question 39

True or False: Cytokinins can delay senescence in leaves.

Answer 39

True

Question 40

What is the effect of abscisic acid on seed germination?

Answer 40

It inhibits seed germination.

Question 41

Multiple choice: Which hormone is associated with the promotion of flowering in long-day plants? A) Auxins B) Gibberellins C) Ethylene

Answer 41

B) Gibberellins

Question 42

What is the role of ethylene in plant responses to mechanical stress?

Answer 42

It helps plants adapt to mechanical stress by promoting thickening of stems.

Question 43

Fill in the blank: _____ is a natural growth regulator involved in the ripening of bananas.

Answer 43

Ethylene

Question 44

True or False: Auxins inhibit lateral root formation.

Answer 44

False

Question 45

What is the importance of cytokinins in agricultural practices?

Answer 45

They are used to enhance crop yield and delay aging.

Question 46

Multiple choice: Which hormone is primarily involved in fruit development? A) Abscisic Acid B) Gibberellins C) Cytokinins

Answer 46

B) Gibberellins

Question 47

What is the effect of auxins on root formation?

Answer 47

They promote the formation of adventitious roots.

Question 48

Fill in the blank: _____ promotes the growth of axillary buds.

Answer 48

Cytokinins

Question 49

True or False: Ethylene is involved in the process of senescence.

Answer 49

True

Question 50

What is the role of abscisic acid in drought conditions?

Answer 50

It promotes stomatal closure to reduce water loss.

Question 51

Multiple choice: Which hormone is known for its role in breaking dormancy in seeds? A) Cytokinins B) Gibberellins C) Ethylene

Answer 51

B) Gibberellins

Question 52

What is the primary site of gibberellin production?

Answer 52

Young tissues, such as developing seeds and leaves.

Question 53

Fill in the blank: Ethylene is produced in response to _____ and stress.

Answer 53

wounding

Question 54

True or False: Cytokinins promote shoot growth over root growth.

Answer 54

True

Question 55

What is the significance of auxins in phototropism?

Answer 55

They cause differential growth in response to light direction.

Question 56

Multiple choice: Which hormone can inhibit the synthesis of ethylene? A) Gibberellins B) Abscisic Acid C) Auxins

Answer 56

B) Abscisic Acid

Question 57

What is the overall effect of gibberellins on plant height?

Answer 57

They increase plant height by promoting internode elongation.

Question 58

Fill in the blank: _____ is involved in the regulation of leaf and fruit abscission.

Answer 58

Ethylene

Question 59

True or False: Auxins are synthesized in response to environmental stimuli.

Answer 59

True

Question 60

What is the role of cytokinins in plant tissue culture?

Answer 60

They stimulate shoot proliferation and regeneration.

Question 61

Multiple choice: Which hormone can delay fruit ripening? A) Gibberellins B) Abscisic Acid C) Ethylene

Answer 61

B) Abscisic Acid

Question 62

What is the primary role of auxins in root growth?

Answer 62

To promote the elongation of root cells.