Ethylene

Q.

Which of the following helps in preventing the premature falling of fruit and leaf at early stages?

1. Auxins

2. Ethylene

3. Cytokinins

4. Gibberellic acid

Q. Water moves from the soil to the root hair cells by the process of _____.

1. diffusion
2. osmosis
3. active transport
4. imbibition

Q.

Is ethylene a plant growth inhibitor or promoter?

Q.

What would be expected to happen if a rotten fruit gets mixed with unripe fruits?

Q.

Ripening of fruits in plants is promoted by:

1. Auxin

2. Cytokinins

3. Abscisic acid

4. Ethylene

Q. If a ripe apple is kept in a basket with unripe apples it causes the ripening of all the unripe ones . How?

Q.

Ethylene is a gaseous plant hormone released outside the plant body.

1. Ethylene

2. Zeatin

Q.

Which is the only gaseous phytohormone in nature?

1. Zeatin

2. GA

3. IAA

4. Ethylene

Q. Ethylene helps in ripening of the fruit. If we keep ripened fruit with unripened fruit then the unripened fruit get ripened how can ethylene ripe a fruit which has bee n divided from the tree.how will they get energy to ripe

Q.

Some fruits can be ripened by placing them in a plastic bag with a ripe banana. Ripe banana releases ethylene which ripens all the other raw fruits.

1. True

2. False

Q. Which of the following pair is correctly matched?

1. Auxin – cell division
2. Gibberellin – stem elongation
3. Cytokinin – inhibits growth
4. Abscisic acid- seed germination

Q.

All living cells produce ethylene. But one of these tissues are known to produce more ethylene compared to others. Identify the tissue.

1. Epithelial tissue

2. Epidermal tissue

3. Meristematic tissue

4. Vascular tissue

Q. What is the role of auxins in plant harmone ?

Q. State true or false

Artificial ripening of fruits is carried out by gibberellins.

Q.

Which of the following is a function of the hormone ethylene?

1. Helps in the cell elongation

2. Controls the seed dormancy

3. Induces the ripening of the fruits

4. Helps in the cell division in plants

Q.

Petioles of leaves are weakened leading to falling of leaves due to

1. Excess production of ethylene

2. Excess production of gibberellin

3. Excess production of cytokinin

4. Excess production of auxin

Q. is the plant hormone which is responsible for the following changes.

1. Ethylene
2. Auxin
3. Gibberellin

Q.

Which of the following are the effects of ethylene on plants?

1. Thickening of stem.

2. Ripening of fruit

3. Seedless fruit

4. Cell division

Q.

Is ethylene harmful to humans?

Q. The hormone called is used to produce seedless fruits.

1. auxin
2. gibberellin
3. cytokinin
4. ethylene

Q. Which of these hormones is used to produce seedless fruits?

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

Q. Phytohormones are chemicals that regulate plant growth. They are signal molecules produced within the plant, and occur in extremely low concentrations. Which of the following are not phytohormones?

1. Auxins
2. Jasmonates
3. Cytokinins
4. Corticoids

Q.

Expand IAA.

Q.

Petioles of leaves are weakened leading to falling of leaves due to

1. Excess production of ethylene

2. Excess production of gibberellin

3. Excess production of cytokinin

4. Excess production of auxin

Q. Match the names of the phytohormones with the examples listed under.

	List I		List II
A	Auxin	p	GA3
B	Gibberellin	q	Indole acetic acid
C	Cytokinin	r	Abscisic acid
D	Dormin	s	Acetic acid
		t	Zeatin

1. A- q, B- t, C- p, D- r
2. A- q, B- p, C- t, D- r
3. A- q, B- s, C- p, D- t
4. A- q, B- r, C- p, D- t

Q.

How does bananas ripen when we light incense stick near it?

Q.

All living cells produce ethylene. But one of these tissues are known to produce more ethylene compared to others. Identify the tissue.

1. Epithelial tissue

2. Epidermal tissue

3. Meristematic tissue

4. Vascular tissue

Q.

Petioles of leaves are weakened leading to falling of leaves due to

1. Auxin

2. Abscisic acid

3. Gibberellin

4. Cytokinin

Q. Ethylene is present in the tissues of ripening fruits, nodes of the stem, ageing leaves and flowers.

1. True
2. False

Q.

If during fermentation of fruit ethanol is produced then why does it stink