Hormones in Plants

Q.

The term 'hormone' was first coined by _______

1. Bateson and Punnet

2. Linus Pauling

3. Bayliss and Starling

4. F W Kent

Q. Which of the following hormone is used to produce seedless fruits?

1. Abscisic acid
2. Gibberellin
3. Adrenaline
4. Ethylene

Q.

Why does auxin move away from the light?

Q.

What will happen if the intake of iodine in our diet is low?

Q. The curvature of shoots due to the action of auxin during the phototropic movement occurs:

1. On the entire shoot tip
2. At the shady side of the shoot
3. Far away from the shoot tip
4. At the sunny side of the shoot

Q.

Why do leaves drop off seasonally?

Q.

Name the ‘emergency hormone’ and the gland that produces it.

Q. What are artificial plant hormones? List them down.

Q.

Which hormone is anti-auxin?

Q.

Explain the functions of plant hormones in detail.

Q.

Which hormone is most likely to be present in greater concentration in areas of rapid cell division?

1. Abscisic acid

2. Gibberellins

3. Cytokinins

4. Auxin

Q.

Which of these is not a plant hormone?

1. Gibberellin

2. Insulin

3. Ethylene

4. Cytokinin

Q. Match the hormones with their functions.

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

Q.

Explain how auxins promote the growth of a tendril around support.

Q. Which of these is not a plant growth promoter?

1. Auxin
2. Cytokinins
3. Ethylene
4. Gibberellins

Q. Identify the artificial plant hormones.

Q.

Name the plant hormone which stimulates elongation of stem and expansion of leaf.

Q.

Match the following:-

	A		B
1	Cell elongation and apical dominance	a	Ethylene
2	Cell division	b	Gibberellins
3	Wilting of leaves	c	Auxin
4	Fruit ripening	d	Cytokinin
5	Breaking seed dormancy	e	Abscisic acid

1. 1-d, 2-a, 3-e, 4-a, 5-b

2. 1-c, 2-d, 3-a, 4-e, 5-b

3. 1-c, 2-d, 3-e, 4-a, 5-b

4. 1-b, 2-d, 3-a, 4-e, 5-c

Q.

Insulin is the phytochemical hormone responsible for plant cell division.

1. False

2. True

Q.

Cytokinins are known to

1. delay senescence

2. Inhibit cytoplasmic movement

3. Influence water transport

4. promote abscission

Q.

The bending of shoot due to auxins during phototrophic movements occurs:

1. Far away from the shoot tip

2. None of these

3. Behind the shoot tip

4. Shady side of the shoot

Q.

Does seaweed extract provide micronutrients?

Q.

Identify the odd term in a set and name the category to which the remaining 3 belongs

1. Gibberellin

2. Auxin

3. Vasopressin

4. Abscisic acid

Q.

Differentiate between thyroid and pancreas hormones.

Q.

How is iodine important to our body?

Q.

The phenomenon of shedding of leaves and the fruits by the plant is known as abscission.

1. True

2. False

Q.

A natural auxin found in plants.

Q. Is cytokinesis necessary after karyokinesis in meiosis I?

Q. The curvature of shoot due to auxins during phototrophic movements occur:

1. Far away from the shoot tip.
2. At the shady side of the shoot.
3. At the sunny side of the shoot tip.
4. Behind the shoot tip.

Q.

Name various naturally occurring phytohormone.