Question

Match the plant hormones in column I with its discovery/typical physiological effect in column II.

• A. A- 4, B-1, C-3, D-5, E- 2
• B. A- 4, B-5, C-2, D-3, E- 1
• C. A- 1, B-4, C-2, D-3, E- 5
• D. A- 1, B-4, C-5, D-2, E- 3

Answer 1

The correct option is C A- 1, B-4, C-2, D-3, E- 5

Auxins were first isolated from human urine and it is the main growth hormone.
Gibberellin is responsible for internodal elongation which can increase the height of genetically dwarf plants.
Cytokinin was first discovered as kinetin, a modified form of adenine, a purine from the autoclaved herring sperm DNA.
Ethylene is a simple gaseous plant growth regulator which stimulates ripening of fruits.
Abscisic acid inhibits germination of seeds, causing seed dormancy.