1. A particular cell has higher concentration of CI ions in the extr compared to
ID: 202836 • Letter: 1
Question
1. A particular cell has higher concentration of CI ions in the extr compared to the cytosol. From this information you can condude that extracellular environment as A. For chloride ions to enter the cell, it will have to do so with the aid of a protein that utillzes ATP. B. For chloride ions to exit the cel it will most likely do so without the aid of a C. D. E. protein that utilizes ATP For chloride ions to enter the cell, it will do so through simple diffusion. For chloride ions to exit the cell, it will do so through a pump that utilizes ATP. Both C & D are equally true. 2. Which of the following would lead to the greatest increase in cell membrane permeability? A. A lipid bilayer with more saturated fatty acids than unsaturated. B. A lipid bilayer with fewer cis double-bonds. C. A lipid bilayer with longer phospholipid tail. D. A lipid bilayer with more cis double-bonds. E. Both C & D would equally increase cell membrane permeability. 3. With regards to a transmembrane protein, you KNOW that A. Amino acids that span the plasma membrane can only be hydrophobic. B. This protein will move around within the plasma membrane. C. This protein will be stationary within the membrane. D. This protein will have at least two hydrophilic regions. E. There is more than one correct answer above. 4. A cell cell A) has aquaporins in its plasma membrane, whereas another cell (Cell B) does not. Using just this information you KNOW that A. Water will enter cell A while water will not enter cell B B. The rate of water moving into cell A will be faster than water moving to cell B. C. Cell B has a larger surface area to volurne ratio than cel A. D. Cell A is in a different tissue from cell B. E. You can not possibly know any of the above.Explanation / Answer
1.E
2.LONGER PHOSPHOLIPID TAIL REDUCED PERMEABILITY,D
3. That spans the entirety of the biological membrane ,they have both hydrophobic and hydrophilic regions
4.aquaporins mainly facilitating transport of water between cells
aquaporins through which water can flow more rapidly into and out of the cell in the absence no free movement.
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