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TLS Online TPP Program
#Question id: 12409
#Unit 6. System Physiology – Plant
The Chemical Structure of ABA Determines Its Physiological Activity, 15 carbon compound
a) The orientation of the carboxyl group at carbon 2 determines the cis and trans isomers of ABA. Nearly all the naturally occurring ABA is in the cis form
b) S enantiomer is the natural form; commercially available synthetic ABA is a mixture of approximately equal amounts of the S and R forms.
c) The S enantiomer is the only one that is active in fast responses to ABA, such as stomatal closure
d) In long-term responses, such as seed maturation, only R-enantiomers are active
e) In contrast to the cis and trans isomers, the S and R forms cannot be interconverted in the plant tissue
Which of the following is the correct prediction about the active form of ABA?
TLS Online TPP Program
#Question id: 12410
#Unit 6. System Physiology – Plant
Precursor of the ABA is___
TLS Online TPP Program
#Question id: 12515
#Unit 6. System Physiology – Plant
The most widely used techniques allows detection of as little as 10^13 g ABA by
TLS Online TPP Program
#Question id: 12516
#Unit 6. System Physiology – Plant
ABA Is Synthesized from a Carotenoid Intermediate is takes place in___
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