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TLS Online TPP Program
#Question id: 12517
#Unit 6. System Physiology – Plant
Synthesis of violaxanthin is catalyzed by an enzyme known as__
TLS Online TPP Program
#Question id: 12518
#Unit 6. System Physiology – Plant
ABA inactivation by oxidation and by the conjugation process such as
a) ABA inactivation by oxidation with monosaccharides ABA-β-D-glucose ester
b) ABA inactivation by conjugation with monosaccharides ABA-β-D-glucose ester
c) ABA inactivation by oxidation into Phaseic acid
d) ABA inactivation by conjugation by oxidation into Phaseic acid
Which of the following combination from the given above statements about conjugation and oxidation process
TLS Online TPP Program
#Question id: 12519
#Unit 6. System Physiology – Plant
Some given statements about biosynthesis of Abscisic acid ;
a) ABA is synthesized in almost all cells that contain chloroplasts or amyloplasts
b) ABA is a 15-carbon terpenoid, or sesquiterpenoid, which is synthesized in plants by an indirect pathway via 40-carbon carotenoid intermediates
c) Cleavage of the carotenoid by the enzyme NCED (9-cis-epoxycarotenoid dioxygenase) is a rate-limiting
d) Oxidation by ABA-8′-hydroxylases lead to ABA inactivation, ABA can also be inactivated by conjugation, but this is irreversible. Both types of inactivation are also tightly regulated.
Which of the following combination from the above statements is correct?
TLS Online TPP Program
#Question id: 12520
#Unit 6. System Physiology – Plant
During the biosynthesis of precursor All-trans-β-carotene is isomerized to 9-cis-β-carotene by ____A_____While 9-cis-β-Carotene is cleaved by carotenoid cleavage_____B_______ to produce_____C______.
TLS Online TPP Program
#Question id: 12521
#Unit 6. System Physiology – Plant
Which of the following enzyme of ABA biosynthesis function as a rate limiting enzyme?
TLS Online TPP Program
#Question id: 12522
#Unit 6. System Physiology – Plant
The receptor of ABA such as PYR/PYL/RCAR are the member of the ___