#Question id: 2212
#Unit 2. Cellular Organization
Membrane lipids may
a. spontaneously flip-flop from one membrane leaflet to the other.
b. move laterally within one membrane leaflet.
c. aggregate with membrane proteins to form lipid rafts.
d. be unequally distributed in the two membrane leaflets.
e. be present in varying amounts in different cellular membranes
#Question id: 2213
#Unit 2. Cellular Organization
Which of the following properties is (are) typical of uniport proteins?
#Question id: 2214
#Unit 2. Cellular Organization
Which of the following is true about glucose transporters?
#Question id: 2215
#Unit 2. Cellular Organization
Which statement describes the mode of action of the ABCB1 transporter (the first eukaryotic ABC transporter to be recognized)?
#Question id: 2216
#Unit 2. Cellular Organization
Gorter and Grendel's earliest evidence that membranes were formed from a lipid bilayer included:
#Question id: 2217
#Unit 2. Cellular Organization
In immunofluorescence studies you always see the small G-protein Ras in a specific region of the cell and, given its protein sequence along with many other proteins localized to this area, you hypothesize that their C-terminal Cys-Ala-Ala-X (X can be any amino acid) motifs may be responsible for targeting these proteins to this subcellular region. To test this hypothesis, you genetically engineer the sequence encoding this motif onto a cDNA encoding green fluorescent protein. When immunofluorescence is used, where specifically would you expect to see GFP localized in the cell?