Friday Special 14/03/2025

1. What is the role of auxin in phototropism?

• a) It inhibits cell elongation on the side of the plant that is exposed to light
  

• b) It promotes cell elongation on the shaded side of the plant

• c) It blocks the movement of water toward the light

• d) It prevents the plant from bending towards light

2. Which phytohormone is primarily responsible for the ripening of fruits?

• a) Cytokinins

• b) Gibberellins

• c) Ethylene

• d) Abscisic acid

3. In which part of the plant is auxin predominantly produced?

• a) Roots

• b) Flowers

• c) Apical meristem

• d) Leaves

4. What is the main function of gibberellins in plants?

• a) To promote root growth

• b) To regulate water loss during transpiration

• c) To stimulate seed germination and stem elongation

• d) To inhibit leaf abscission

5. Abscisic acid is known to play a key role in which of the following?

• a) Stimulating fruit ripening

• b) Promoting the growth of lateral buds

• c) Inducing seed dormancy and closing stomata during water stress

• d) Promoting flowering in long-day plants

6. Which plant hormone is primarily involved in promoting cell division and growth of lateral buds?

• a) Gibberellins

• b) Cytokinins

• c) Abscisic acid

• d) Auxin

7. In which part of the plant is auxin concentration highest during phototropism?

• a) Shaded side of the plant

• b) Light-exposed side of the plant

• c) Stem tip

• d) Root tip