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 […]
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CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
Key Plant Secondary Metabolites
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 […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Biosynthesis and Characteristics of Plant Terpenes
Following are certain statements regarding terpene class of secondary metabolites in plants: A. Isopentenyl diphosphate and its isomer combine to form larger terpenes. B. Diterpenes are 20 carbon compounds. C […]
CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
Structural Classification and Carbon Number of Terpenes
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, […]
CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
Farnesyl Pyrophosphate: The Branch Point in Sesquiterpene and Triterpene Biosynthesis
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: […]
CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
The Mevalonic Acid and MEP Pathways: Dual Routes for Plant Terpene Biosynthesis
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) […]
CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
Roles and Characteristics of Plant Secondary Metabolites in Stress and Development
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 […]
CSIR NET Life Science Previous Year Questions and Solution Plant Physiology
Carotene as a Representative Terpene in Plant Pigments
Among the following which is a terpene (1) Chlorophyll (2) Lycopene (3) Xanthophyll (4) Carotene Answer: (4) Carotene Explanation: Terpenes […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Coronatine Activation of Jasmonate Signaling via COI1 Inhibits Root Growth During Pathogen Infection
Jasmonate is known to inhibit root growth while auxin facilitates root growth. Upon infection with pathogenic bacteria that produce coronatine, we may expect the following in plants: A. Upregulation of […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Constitutive Activation of MKK1 in MAPK Cascade Triggers Abiotic Stress Response Independent of Stimuli
A specific Mitogen Activated Protein Kinase (MAPK) cascade comprising MEKK1(a MAP3K), MKK1 (a MAP2K) and MPK6 (a MAPK) is activated sequentially in that order in Arabidopsis plants upon perceiving certain […]
