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11. Plants are known to synthesize more than 30,000 terpenoids, involving four stages of biosynthesis. Column X                Column Y A. Biosynthesis       i. Terpene of two basic five        synthases carbon unit            […]

10. Secondary metabolites are diverse array organic compounds in plants. The following are certain statements about secondary metabolites: A. They protect plants against being eaten by herbivores and against being […]

9. The gene encoding for mevalonate-3-kinase is disrupted in a certain plant. Which one of the following staternents concerning the above plant is correct? (1) Mevalonic acid 3,5-biphosPhate will be […]

8. In terpene biosynthesis pathways, three acetyl-CoA are joined together stepwise to form mevalonic acid. mevalonic acid to form isopentenyl diphosphate or Which one of the following three- steps is […]

Following are certain statements regarding secondary metabolites found in plant: A. All terpenes are derived from a six carbon element. B. Alkaloids are nitrogen containing compounds. C. Pyrethroids, a monoterpene […]

Following are a few statements regarding the structure of terpenes: A. Isopentenyl diphosphate and farnesyl diphosphate are monoterpene and sesquiterpene, respectively. B. Squalene and geranyl diphosphate are triterpene and monoterpene, […]

Which of the following acts as a branch point for the bioosynthesis of sesquiterpene and triterpenes? (1) Farnesyl pyrophosphate (2) Geranyl pyrophosphate (3) Isopentyl pyrophosphate (4) Hydroxyrnethylglularyl -CoA Correct answer: […]

Which one of the following combinations of secondary metabolite biosynthetic pathway result in the biosynthesis of terpenes? (1) Mevalonic acid and MEP pathways (2) Malonic acid and MEP pathways (3) […]

The following statements are made regarding secondary metabolites of plants: A. All secondary metabolites are constitutively produced in all cells of a plant during its entire life B. They serve […]