Question No:1

How many of the following auxins are obtained from plants?
IAA, IBA, NAA, 2, 4-D

[A] 1
[B] 2
[C] 3
[D] 4



Question No:2

NAA stands for ______.

[A] Nitro-acetic acid
[B] Nitro aceto acetate
[C] Naphthalene acetic acid
[D] Naphthaloaceto acetic acid



Question No:3

2, 4-D stands for _____

[A] 2,4—Dichlorophenoxy acetate
[B] 2, 4—Dextrophenoxy acetate
[C] 2, 4-Diphosphenoxy acetate
[D] 2, 4-Dichloromethoxy acetate



Question No:4

Synthetic auxins are extesively used in

[A] agriculture
[B] horticulture
[C] both
[D] none



Question No:5

Natural auxins are extensively used in

[A] agriculture
[B] horticulture
[C] both
[D] none



Question No:6

Which effect of auxin is applied worldwide for plant propagation?

[A] Apical dominance
[B] Herbicidal action
[C] Initiate rooting in stem cutting
[D] None



Question No:7

Auxins promote flowering in

[A] tomatoes
[B] pineapples
[C] oranges
[D] none



Question No:8

What prevents fruit and leaf to drop in early?

[A] ABA
[B] IAA
[C] NAA
[D] Both (b) and (c)



Question No:9

What promotes abscission of older mature leaf?

[A] Abscisic acid
[B] Auxin
[C] ehtylene
[D] Cytokinins



Question No:10

In most higher plants, the growing apical bud inhibits growth of lateral bud. This phenomena is called

[A] Apical tolerance
[B] Axial intolerance
[C] Apical ordinance
[D] Apical dominance



Question No:11

What can help removing apical dominance?

[A] Removal of shoot tips
[B] provide plant with a lot of auxin
[C] Both
[D] None



Question No:12

The process of removal of shoot tip to avoid apical dominance is called _____

[A] Apexotomy
[B] Decapitation
[C] Both
[D] Capitation



Question No:13

Decapitation is widely used for

[A] tea plantation.
[B] hedge-making.
[C] both.
[D] none.



Question No:14

Which of the following PGR can induce parthenocarpy?

[A] IBA
[B] 2,4-D
[C] Terpenes
[D] Kinetin



Question No:15

Auxins induce parthenocarpy in which plants?

[A] Tomato
[B] Pineapple
[C] Apple
[D] All