The phytohormone, which was first isolated from human urine, shows

a.	Bolting effect.
b.	Apical dominance.
c.	Control of xylem differentiation.
d.	Promote leaf senescence.
e.	Ripening of fruit.
f.	Initiation of rooting is stem cuttings.

 

1.	b, c and f
2.	a, d and e
3.	b, e and f
4.	a, b and d

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. Gibberellin & abscisic acid

Early seed production in…….. can be done by GAs

1.Pineapple

2.Grapes

3.Tomatoes

4.Conifers

Which of the following statements is correct?

1. All GAs are basic

2. All GAs are Acidic

3. Most of the GAs are Acidic

4. Most of the GAs are basic

For tea plantations, hedge-making, which of the following PGR is used?

1.Auxins

2.Cytokinins

3.GA3

4.ABA

In most higher plants, the growing apical bud inhibits the growth of …….. or axillary buds, a phenomenon called………….

Auxins

Find the odd one.

1.Initiate rooting in stem cuttings

2.Promote flowering e.g. Pineapples

3.Prevent fruit and leaf drop at early stages

4.Prevent the abscission of older mature leaves and fruits

Auxin means

1.To escape

2.To slow

3.To grow

4.To fasten

Cousins confirmed the release of a volatile substance from ripened oranges that

Which of the following is not ABA?

1.Inhibitor-B

2.Abcission II

3.Dormin

4.Bakane