- 1(current)
Q. No.The diagram shows the schematic representation of an experiment that made bioassay of auxins possible. This experiment was done by:
| 1. | Darwin | 2. | Boysen Jenson |
| 3. | Paal | 4. | Went |
Subtopic: Auxin Function |
68%
Level 2: 60%+
By continually removing apical buds, horticulturists can remodel a tree or a shrub into remarkable shapes as shown in the given figure. The reason is:
| 1. | When the apical bud is removed, the lowered IAA concentration allows the lateral buds to grow and produce new shoots, which compete to become the lead growth. |
| 2. | When the apical bud is removed, the increased IAA concentration allows the lateral buds to grow and produce new shoots, which compete to become the lead growth. |
| 3. | When the apical bud is removed, the lowered IAA concentration stops the growth of lateral buds and production of new shoots. |
| 4. | When the apical bud is removed, the increased IAA concentration stops the growth of lateral buds and production of new shoots. |
Subtopic: Auxin Function |
75%
Level 2: 60%+
To promote stem elongation, gibberellins act in concert with:
| 1. | Auxins | 2. | Cytokinins |
| 3. | Ethylene | 4. | ABA |
Subtopic: Growth Hormones & Auxin | Auxin Function | Gibberellin |
50%
Level 3: 35%-60%
To unlock all the explanations of this course, you need to be enrolled.
Hints
To unlock all the explanations of this course, you need to be enrolled.
Identify the correct statements regarding auxins?
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
| I: | Auxin stimulates cell elongation by stimulating wall-loosening factors, such as expansins, to loosen cell walls. |
| II: | When auxin and cytokinin are applied to callus, rooting can be generated with higher auxin to cytokinin ratios, shoot growth is induced by lower auxin to cytokinin ratios. |
| III: | Auxin induces the formation and organization of phloem and xylem. |
| IV: | In low concentrations, auxin can inhibit ethylene formation and transport of precursor in plants; however, high concentrations can induce the synthesis of ethylene. |
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Auxin Function |
55%
Level 3: 35%-60%
- 1(current)
Q. No.
© 2026 GoodEd Technologies Pvt. Ltd.