#Question id: 5004
#Unit 11. Evolution and Behavior
Pax-6 usually causes the production of a type of light-receptor pigments. In vertebrate eyes, though, a different gene (the rh gene family) is responsible for the light-receptor pigments of the retina. The rh gene, like Pax-6, is ancient. In the marine ragworm, for example, the rh gene causes production of c-opsin, which helps regulate the wormʹs biological clock. Which of these most likely accounts for vertebrate vision?
#Question id: 12454
#Unit 10. Ecological Principles
#Question id: 4098
#Unit 3. Fundamental Processes
A merodiploid with a mutant repressor gene (Is) is shown below. The mutant repressor therefore binds irreversibly to both operators and will render
#Question id: 11840
#Unit 1. Molecules and their Interaction Relevant to Biology
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: 7254
#Unit 5. Developmental Biology
Following statements regarding to the micromeres specification and regulatory input in sea urchin embryo. Which of the following statement is correct?