Identify the option where all the columns are not correctly matched:

	PGR	Nature	Actions
1.	Auxin	Indole compounds	Apical dominance, Flowering in pineapples, Parthenocarpy in tomatoes
2.	Cytokinin	Adenine derivative	Cell division, Adventitious shoot formation, Delay in leaf senescene
3.	Gibberellin	Terpene	Increase in length
4 .	ABA	Carotenoid derivative	Closure of stomata in water stress, inducing seed dormancy, inducing flowering in mango

 

The PGR used to induce parthenocarpy in tomatoes is:-

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

Primary and secondary growth are inhibited by:

1. Auxins

2. Gibberellins

3. Abscisic acid

4. Cytokinins

Fruit and leaf drop at early stages can be prevented by the application of 
1. Cytokinins
2. ethylene
3. auxins
4. gibberellic acid 

you are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
(1) IAA and gibberellin 

(2) Auxin and cytokinin

(3) Auxin and abscisic acid

(4) Glbberellin & abscisic acid

Phytochrome is a 
(1) flavoprotein

(2) glycoprotein

(3) lipoprotein

(4) chromoprotein

The Avena curvature is used for bioassay of 
(1) GA₃

(2) IAA

(3) Ethylene

(4) ABA

Auxin can be bioassayed by

1. Avena coleoptile curvature

2. hydroponics

3. potometer

4. lettuce hypocotyl elongation

What causes a green plant exposed to the light on only one side, to bend toward the

source of light as it grows?

1. Green plants need light to perform photosynthesis

2. Green plants seek light because they are phototropic

3. Light stimulates plant cells on the lighted side to grow faster

4. Auxin accumulates on the shaded side, stimulating greater cell elongation there

Dr. F Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?

1. It made possible the isolation and exact identification of auxin.

2. It is the basis for quantitative determination of small amounts of growth-promoting substances

3. It demonstrated polar movement of auxins

4. It supports the hypothesis that IAA is auxin