#Question id: 11850
#Unit 6. System Physiology – Plant
The first step in polar transport is auxin influx. According
to the model, auxin can enter plant cells from any direction by either of two
mechanisms:
a) Passive diffusion of the protonated (IAAH) form across
the phospholipid bilayer
b) Secondary active transport of the dissociated (IAA–) form
via a 2H+–IAA– symporter
c) Active diffusion of the protonated (IAAH) form across the
phospholipid bilayer
Find out the correct statements of about diffusion of IAA.
#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__