Question

Gibberellin is a
(a)Sterol
(b)Vitamin
(c)Sugar
(d)Protein

Answer 1

Gibberellin is associated with various physiological and metabolic processes of plants. It aids in elongation of the stem, flowering, and germination of seeds in the plant. CCC (2-chloroethyl trimethylammonium chloride) is a general biosynthetic inhibitor of Gibberellin.

Complete answer:
Gibberellin also is known as gibberellic acid which is a plant hormone that is chemically diterpenoids. synthesis of gibberellin involves two major pathways which are mevalonic acid-dependent and mevalonic acid-independent pathways. Synthesis of sterol is related to the Mevalonic acid-dependent pathway. synthesis of carotenoids involves a mevalonic acid-independent pathway. In the MVA pathway, Farnesyl pyrophosphate forms any of triterpenes and sterols or forms diterpenes and gibberellin.

Additional Information: -In lab-scale, Gibberellin is applied to induce germination of seeds, which will stay dormant if Gibberellin is not applied on the outside of the seed. This method is common among grape cultivators and vineyards to harvest good quality grapes.
-Gibberellin shows prominent stem extension, but prolonged use of gibberellic acid makes plants resistant to it. Certain studies showed plants with any stem elongation even after the addition of a high concentration of gibberellic acid.
-At the cellular level, Gibberellin triggers seed metabolism and induces the production of mRNA which codes for hydrolytic enzymes.
So, the correct answer is ‘Sterol’.

Note: - Gibberellin is generally applied in the barley malting industry, where it is sprayed after the steeping process to create uniform growth. This provides cultivators right-sized kernels required for the industry.
- Gibberellin got its name from its creator Gibberella fujikuroi who identified gibberellic acid in 1926 in Japan.
-After synthetic production and purification, Gibberellin is obtained as a whitish pale-yellow solid which is easily separated in the downstream process.