#Question id: 11838
#Unit 6. System Physiology – Plant
Which of the following ethylene receptors in Arabidopsis) have intrinsic histidine kinase activity, and this activity does not appear to play an essential role in signalling?
#Question id: 11839
#Unit 6. System Physiology – Plant
Ethylene receptor are localized in___
#Question id: 11840
#Unit 6. System Physiology – Plant
During an ethylene signalling pathway, what will have done inside cytosol and nucleus . Given below some
prediction about presence and absence of ethylene in column B match with column
A
|
COLUMN A |
COLUMN B |
|
I- In the presence of ethylene |
a) ETR1 signaling is repressed and CTR1 is
inactive |
|
II-
In the absence of ethylene |
b) ETR1 activate CTR1, a Ser/Thr kinase |
|
|
c) CTR1 phosphorylates the C-terminal domain
of EIN2 |
|
|
d) The nonphosphorylated C terminus of EIN2 is
cleaved by a protease |
|
|
e) Phosphorylation of EIN2 inhibits
proteolytic cleavage |
|
|
f) EIN3 transcription factors are
ubiquitinated and degraded in the nucleus by the 26S proteasome |
|
|
g) EIN3 initiates a transcriptional cascade by
activating expression of ethylene-responsive genes, including ERF1
transcription factor, leading to ethylene responses |
#Question id: 11841
#Unit 6. System Physiology – Plant
Multiple isoforms of ethylene receptors may be present in a cell. The receptor is a dimer, held together by______X_________. Ethylene binds within the transmembrane domain, through________Y______, which is assembled into the ethylene receptors.
#Question id: 11842
#Unit 6. System Physiology – Plant
What is the function of EIN3 in ethylene signalling pathway?
#Question id: 11843
#Unit 6. System Physiology – Plant
During an experiment Six-day-old pea seedlings were grown in the dark in the presence of 10 ppm (parts per million). Firstly, Grown seedling treated with ethylene and secondly grown seedling left untreated. What will be the conclusion has been drawn from this experiments?