#Question id: 11593
#Unit 6. System Physiology – Plant
Following are given stages of gibberellin biosynthetic
pathway;
a) Geranylgeranyl diphosphate (GGPP) is converted to
ent-kaurene via copalyl diphosphate
(CPP) in endoplasmic reticulum
b) In the endoplasmic reticulum, conversion of ent-kaurene
into GA12 or GA53 depending on whether the GA is hydroxylated at carbon 13
c) the conversion of GA12 or GA53 into other GAs in cytosol
proceeds with a series of oxidations at carbon 20
d) GA20 is then oxidized to the active gibberellin, GA1, by
a 3β-hydroxylation reaction
Which of the following is the correct statements of GA biosynthesis?
#Question id: 11594
#Unit 6. System Physiology – Plant
Given some compounds that are the first stage inhibitor of gibberellin biosynthesis except?
#Question id: 11595
#Unit 6. System Physiology – Plant
Paclobutrazol and other inhibitors of P450 monooxygenases specifically inhibit the stage of gibberellin biosynthesis
#Question id: 11596
#Unit 6. System Physiology – Plant
Which enzyme catalyzes all the reactions involving the successive oxidation steps of carbon 20 between GA53 and GA20, including the removal of C-20 as CO2?
#Question id: 11597
#Unit 6. System Physiology – Plant
GA 2-oxidase catalyzing the addition of a hydroxyl group to C-2 by inactivates
#Question id: 11598
#Unit 6. System Physiology – Plant
How the GA3 is differ from GA1______