#Question id: 23458
#General Aptitude
#Question id: 8963
#Unit 9. Diversity of Life Forms
#Question id: 3490
#Unit 11. Evolution and Behavior
Given below are some behaviors strategies.
A) Fixed action pattern, complex sequence of behavior, Once released and continuous to completion, even when there is change in surrounding environment
B) natural selection select that territorial behavior that is benefit is greater than cost
C) Imprinting, a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience
D) Donor benefits at a cost to the recipient, the behavior is altruistic; when the recipient benefits at a cost to the donor, the behavior is selfish.
Which one of the following correct combination of true and false?
#Question id: 1255
#Unit 4. Cell Communication and Cell Signaling
Following statements are regarding to the mechanism of action of cholera toxin.
A. cholera toxin is a homodimeric protein, target G proteins, interfering with normal signaling in host cells.
B. cholera toxin associates with a small G protein, known as ARF6.
C. association with ARF6 activates cholera toxin, which catalyzes the transfer of ADP-ribose from NAD+ to the critical Arg residue in the P loop of the alpha subunit of Gs.
D. ADP-ribosylation blocks the GEF activity of Gs and thereby renders Gs permanently inactive.
E. This results in continuous activation of the adenylyl cyclase of intestinal epithelial cells, chronically high cAMP, and active PKA dephosphorylates the CFTR Cl- channel and a sodium-proton exchanger in the intestinal epithelial cells.
Which of the following combination is correct?
#Question id: 23183
#Unit 13. Methods in Biology