Growth Hormones Auxin

One of the synthetic auxin is:

1. NAA

2. IAA

3. GA

4. IBA

Phototropic curvature is the result of uneven distribution of:

1. gibberellin

2. phytochrome

3. cytokinins

4. auxin

Auxin can be bioassayed by?

1.	Avena coleoptiles curvature
2.	Hydroponics
3.	Ptometer
4.	Lettuce hypocotyl elongation

Who coined the term 'Kinetin'?

1.	Skoog and Miller	2.	Darwin
3.	Went	4.	Kurosawa

Match the following concerning the activity/function and the phytohormone involved:

	Column-I		Column-II
(a)	Fruit ripener	(i)	Abscisic acid
(b)	Herbicide	(ii)	GA 3
(c)	Bolting agent	(iii)	2, 4-D
(d)	Stress hormone	(iv)	Ethephon

Select the correct option from following:

Options:	(a)	(b)	(c)	(d)
1.	(ii)	(iii)	(iv)	(i)
2.	(iii)	(iv)	(ii)	(i)
3.	(iv)	(iii)	(ii)	(i)
4.	(iv)	(ii)	(i)	(iii)

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin

1.	promotes abscission of mature leaves only.
2.	does not affect mature monocotyledonous plants.
3.	can help in cell division in grasses, to produce growth.
4.	promotes apical dominance