#Question id: 11849
#Unit 6. System Physiology – Plant
According to chemiosmotic model for polar auxin transport, auxin _____A_______is driven by the______B________ across the plasma membrane, while auxin ___C_____is driven by the_________D_________
#Question id: 11848
#Unit 6. System Physiology – Plant
Polar transport is specific for active auxins, such as
#Question id: 11847
#Unit 6. System Physiology – Plant
On the basis of isotopic labeling and metabolite
identification, oxidative pathways are more likely to be involved in the
controlled degradation of IAA by____
Statement-I ___IAA is oxidized without decarboxylation to
OxIAA
Statement-II___ IAA-aspartate conjugate is oxidized first to the intermediate dioxindole-3-acetylaspartate, and then to OxIAA
#Question id: 11846
#Unit 6. System Physiology – Plant
In maize orange pericarp (orp) mutant is
#Question id: 11845
#Unit 6. System Physiology – Plant
IAA Is synthesized from__
#Question id: 11844
#Unit 6. System Physiology – Plant
The following statements are made to describe the
biosynthetic pathway of IAA;
a) IPA pathway
involves a deamination reaction to form IPA, followed by a decarboxylation
reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a
specific dehydrogenase
b) IAN pathway is similar to the IPA pathway, except that
the order of the deamination and decarboxylation reactions is reversed, and
different enzymes are involved
c) IAM pathway involves the two enzymes tryptophan monooxygenase and IAM hydrolase
d) In the IAN pathway, tryptophan is first converted to
indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that
converts IAN to IAA is called nitrilase
Which of the following is the correct statements of about the biosynthesis of IAA?