#Question id: 1256
#Unit 4. Cell Communication and Cell Signaling
Scaffolds for MAP kinase pathways are well documented in yeast, fly, and worm cells, but their presence in mammalian cells has been difficult to demonstrate. Perhaps the best documented scaffold protein in metazoans is Ksr (kinase suppressor of Ras).
A. Ksr functions as a molecular scaffold by binding several signaling components of the MAP kinase cascade, including both MEK and MAP kinase; and thus can enhance MAP kinase activation by regulating the efficiency of these interactions.
B. Ksr function as a protein kinase which constitutive activate RTK signalling pathway.
C. Ksr function as a receptor proteins which inhibits RTK signalling pathway.
D. Ksr function as a protein phosphatase which inhibits RTK signalling pathway.
Which of the following statement is correct about Ksr?
#Question id: 860
#Unit 1. Molecules and their Interaction Relevant to Biology
Select true âTâ AND false âFâ about ubiquitinylation
I. These ubiquitin-like modifiers control processes as diverse as nuclear import,
II. Regulated by the ubiquitin-like modifier Sumo, and autophagy,
III. Regulated by the ubiquitin-like modifier Atg8.
IV. For a protein to be efficiently degraded, it must be linked to a chain of at least four tandemly linked ubiquitin molecules in which Lys 34 of each ubiquitin forms an isopeptide bond with the C-terminal carboxyl group of the following ubiquitin.
#Question id: 32410
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 7151
#Unit 5. Developmental Biology
In developmental biology, what is meant by the concept of
"growth"?
a) Growth occurs through increases in cell size.
b) Growth occurs through increases in cell number.
c) Growth can result from increases in the volume of extracellular
matrix between cells.
d) Cell death is an important determinant of overall growth.
Which of the following is correct?
#Question id: 5414
#General Aptitude
If a, b, c, d and e are five consecutive odd numbers, the average is