3. The figure below shows the process of receptor-mediated endocytosis. Which of

Question

3. The figure below shows the process of receptor-mediated endocytosis. Which of the following statements regarding this process is false? Coated vesicle a. Receptor-mediated endocytosis requires receptor proteins located on the cell's surface. b. Coated pits are lined on their cytoplasmic surface by clathrin. c. Receptor-mediated endocytosis is important in cellular uptake of cholesterol. d. Coated vesicles eventually become part of the endoplasmic reticulum. e. Coated vesicles contain previously extracellular material 4. Membrane fragments from different areas of a cell are constantly breaking down, moving, and in some cases fusing with other parts of a membrane. This is possible because of a. protein interactions in each fragment. b. glycolipids recognizing another binding site. c. the splitting of the lipid bilayer to allow additional membrane fragments to enter. d. a change in the hydrophilic head regions of the fatty acids e·the ability of lipids to associate with one another and seal themselves

Explanation / Answer

3. D) Coated vesicles eventually become part of the endoplasmic reticulum.

Receptor mediated endocytosis is the one in which the endocytosis is mediated by clustering. In this process, the cells would be absorbing hormones, metabolised or proteins. In some situations, there is also inward plasma membrane budding where, vesicles would be present on the sites of the receptors as compared to the molecules that are absorbed.

4. E) the ability of lipids to associate with one another and seal themselves

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