Plant Growth Regulators

Q. Which of the following is not a plant growth promoter?

1. Auxin
2. Gibberellin
3. Cytokinin
4. Abscisic acid

Q. Which of the following is not a plant growth regulator?

1. Indole acetic acid
2. Terpenes
3. Carotenoid derivatives
4. Zinc

Q.

Through their effect on plant growth regulators, what do the temperature and light control in the plants?

1. Apical dominance

2. Flowering

3. Fruit elongation

4. Closure of stomata

Q.

How do you accelerate plant growth?

Q. Assertion: Phytohormones are the plant compounds that can promote and inhibit the plant growth.
Reason: There are some phytohormones like auxin, cytokinins which play a role in plant growth and some phytohormones like abscisic acid which inhibit the plant growth.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is true but the reason is false
4. Both assertion and reason are false

Q. Select the pair that consists of plant growth promoter only.

1. Auxins and cytokinins
2. Gibberellins and ABA
3. Ethylene and ABA
4. All of these

Q.

Match the following columns
$\begin{array}{cccc}& ColumnI& & ColumnII\\ A.& Humanurine& 1.& Cytokinin\\ B.& Gibberellafujikuroi& 2.& Auxin\\ C.& HerringfishDNA& 3.& Ethylene\\ D.& Ripeningoffruits& 4.& Abscisicacid\\ E.& Agedleavesofplants& 5.& Gibberellins\end{array}$

1. (A)→(2), (B)→(5), (C)→(1), (D)→(3), (E)→(4)

2. (A)→(2), (B)→(3), (C)→(4), (D)→(5), (E)→(1)

3. (A)→(1), (B)→(5), (C)→(2), (D)→(4), (E)→(3)

4. (A)→(5), (B)→(4), (C)→(3), (D)→(2), (E)→(1)

5. (A)→(3), (B)→(2), (C)→(1), (D)→(5), (E)→(4)

Q. Match the following.
Diverse class of organic compounds Plant growth regulators

1) Indole compounds	i) Abscisic acid
2) Derivatives of carotenoids	ii) Ethylene
3) Terpenes	iii) IAA
4) Gases	iv) Gibberellic acid

1. 1-iii, 2-i, 3-iv, 4-ii
2. 1-ii, 2-i, 3-iv, 4-iii
3. 1-i, 2-iii, 3-iv, 4-ii
4. 1-iii, 2-i, 3-ii, 4-iv

Q. Match the following
$\begin{array}{cc}ColumnI& ColumnII\\ A.Micropropagation& 1.Plantsproducedthroughprotoplastfusion\\ B.Somaclones& 2.Productionofplantsthroughtissuecluture\\ C.Somatichybrids& 3.Fusionofisolatedprotoplasts\\ D.Somatichybridisation& 4.Plantsidenticaltooriginalplants\end{array}$

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

Q. Match the columns and select the correct option.

	Hormones		Functions
A.	Cytokinin	I.	Senescence
B.	Ethylene	II.	Abscission
C.	Abscisic acid	III.	Cell growth
D.	Auxin	IV.	Shoot and root formation

1. A-III, B-I, C-II, D-IV
2. A-I, B-II, C-III, D-IV
3. A-II, B-I, C-III, D-IV
4. A-II, B-IV, C-I, D-III

Q.

Match the following columns.
$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A}& \text{Zeatin}& 1& \text{Flowering hormone}\\ \text{B}& \text{Florigen}& 2& \text{Synthetic auxin}\\ \text{C}& \text{IAA}& 3& \text{Cytokinin}\\ \text{D}& \text{NAA}& 4& \text{Natural auxin}\end{array}$

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

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

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

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

Q. Plant growth regulators are involved in

1. Cell division and cell enlargement
2. Pattern formation and tropic growth
3. Flowering, fruiting and seed formation
4. All of these

Q. Which of the following plant growth regulators is gaseous in nature?

1. Ethylene
2. Abscisic acid
3. Indole acetic acid
4. Cytokinin

Q. Identify the plant growth regulator, which is not a growth-promoting hormone from the options given below.

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

Q. ________ hormone is considered as a plant growth promoter as well as a plant growth inhibitor.

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