#Question id: 11730
#Unit 6. System Physiology – Plant
Following are some statements regarding plant hormones.
a) Auxin and Cytokinin promote cell division
b) Auxin and Ethylene can cause similar plant responses,
such as induction of flowering in pineapple and inhibition of stem elongation
c) cytokinin and ethylene signal transduction pathways are
derived from the bacterial two-component regulatory system mainly multistep
version
d) Gibberellins Are Synthesized via the terpenoid Pathway
e) GA promotes seed dormancy while ABA causes seed
germination
Which of the following from the given above combination is incorrect?
#Question id: 11731
#Unit 6. System Physiology – Plant
Following are some statements regarding the Cytokinin, which of the following is incorrect?
#Question id: 11732
#Unit 6. System Physiology – Plant
Cytokinins are defined as compounds that have biological
activities similar to those of trans-zeatin. These activities include the
ability to do the following:
a) Induce cell division in callus cells in the presence of
an auxin
b) Promote bud or root formation from callus cultures when
in the appropriate molar ratios to auxin
c) promote senescence of leaves
d) Promote expansion of dicot cotyledons
Which one of the following activities are incorrect?
#Question id: 11733
#Unit 6. System Physiology – Plant
The synthetic cytokinin compounds that have not been identified in plants, these are;
#Question id: 11734
#Unit 6. System Physiology – Plant
Some molecules act as cytokinin antagonists, which are able to block the action of cytokinins that is
#Question id: 11735
#Unit 6. System Physiology – Plant
In cytokinin biosynthesis is the addition of the isopentenyl
side chain from DMAPP to an adenosine moiety. The plant and bacterial IPT
enzymes differ substrate used;
a) the bacterial enzyme utilizes AMP
b) the plant enzyme appears to utilize AMP
c) the bacterial enzyme utilizes both ADP and ATP
d) the plant enzyme appears to utilize both ADP and ATP