A tsunami tidal wave hits the east coast of South America and the people living there are forced to drink unclean water. Within the next several days, a large number of people develop severe diarrhea and about half of these people expire. Samples of drinking water are positive for Vibrio cholerae. Which of the following types of ion channels is most likely to be irreversibly opened in the epithelial cells of the crypts of Lieberkühn in these people with severe diarrhea?

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#Question id: 12750

#Unit 13. Methods in Biology

Bacterial culture was treated with SDS and NAOH then centrifuged, supernatant was decanted and treated with potassium acetate and centrifuged to get a pellet. What is the composition of the pellet?

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#Question id: 1728

#Unit 4. Cell Communication and Cell Signaling

Which of the following is characteristic of B- but not T-cells?

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#Question id: 28633

#Unit 2. Cellular Organization

Block the function of Rb by Phosphorylation on multiple sites, these phosphorylation is done by___ 

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#Question id: 1704

#Unit 4. Cell Communication and Cell Signaling

The single best unique description of the interaction of the αβ T-cell receptor with peptide-MHC is that it:

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#Question id: 28767

#Unit 2. Cellular Organization

Plant vacuole act as__

a) storage organelle for nutrients and waste products

b) degradative compartment

c) an economical way of decreasing cell size

d) a controller of turgor pressure