Auxin

Q.

Ripening of bananas is associated with

1. Sudden rise in cytokinin

2. Sudden rise in ethylene

3. Sudden rise in gibberellin

4. Sudden rise in auxin

Q. Zinc is essential for the biosynthesis of:

1. ABA
2. IAA
3. Cytokinin
4. Ethylene

Q. The phytohormone, auxin was first isolated by .

1. C. Darwin
2. F. Darwin
3. F. W. Went
4. F. Skoog

Q.

Pick up the synthetic auxins:

1. IAA

2. IBA

3. NAA

4. All of the above

Q. It takes a very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

1. Cytokinin and abscisic acid
2. Auxin and ethylene
3. Gibberellin and cytokinin
4. Gibberellin and abscisic acid

Q.

Match the following
(a) Indole compounds (i) Kinetin
(b) Terpenes (ii) ABA
(c) Adenine (iii) IAA
(d) Carotenoids (iv) $G{A}_3$

1. a - iv, b - iii, c - ii, d - i

2. a - iii, b - iv, c - i, d - ii

3. a - ii, b - iv, c - i, d - iii

4. a - i, b - ii, c - iii, d - iv

Q.

2, 4 - D widely used to kill dicotyledonous weeds , does not affect mature moocotyledonous plants.

why does it afffect oly dicotyledonous weeds and not monocotyledonous weed.?

Q.

Application of higher concentration of plant growth regulators might cause the

1. Death of a plant

2. Faster growth

3. Chlorosis

4. Stunted growth

Q.

Which of the following plant growth regulators (PGRs) promote root initiation, flowering, and induced parthenocarpy?

1. Gibberellin

2. Auxin

3. Cytokinin

4. Ethylene