Which of the following is true about the phospholipids one would observe in the

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Which of the following is true about the phospholipids one would observe in the membranes of an eukaryotic organism? 0 A. The type of phospholipids found in the membranes of a cell would vary in the different cell types and in the organelles of the different cell types but would be the same in both halves of membrane in each part of a cell. B. The type of phospholipids found in the membrane of a cell would vary in the different cell types, in the membranes of the different organelles and in the two halves of each membrane in the different parts of the cell C. All the membranes in the organism including the membranes of organelles of cells would contain the same ratio of different phospholipids. D. The type of phospholipids found in the membranes of a cell would vary by the cell type but would be the same within all the organelles of the cell OE. All the membranes in the organism including the membranes of organelles would contain only one type of phospholipid QUESTION 5 0.5 points Save Answer Active transport differs from facilitated diffusion in that A. active transport involves the transport of molecules up or against their concentration gradient. B. active transport requires a protein component, whereas facilitated diffusion occurs by simple diffusion through the plasma membrane. C. ions are not transported via active transport. D. active transport involves a conformational change in the transport molecule QUESTION 6 0.5 points Save Answer Which of the following is the best description of the movement observed by integral membrane proteins? A. Integral membrane proteins do not move in any manner in the membrane B. All integral membrane proteins will diffuse lateral through the membrane. C. All integral membrane proteins can flip their orientation in the membrane (portion on outside verse inside). D. Some integral membrane proteins can diffuse laterally through the membrane while others are held in place and do not move laterally and the proteins do not flip their orientation in the membrane E. B and C

Explanation / Answer

4. Answer B. The upper and lower bilayer of membrane contains different phospholipid

5. Answer A. Active transport works against the concentration gradient.

6. B All intergal membrane proteins move laterally.

Flip happens only in fatty acids or bilayer, not in proteins.

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