Consider the Apical Location of a Particular Protein Expressed in Epithelial

question 19

Multiple Choice

Consider the apical location of a particular protein expressed in epithelial cells, illustrated in part A of Figure 11-36.When a molecule that chelates calcium is added to the cell culture medium, you observe a redistribution of that protein around the entire cell, shown in part B of Figure 11-36.Which is most likely to be true about the role of calcium in maintaining an apical distribution of protein A? Figure 11-36

• A)Calcium is required to maintain the structural integrity of the junctional complex.
• B)Calcium is required for the binding of the junctional proteins to the cell cortex.
• C)Calcium is a structural component of protein A.
• D)Calcium inhibits the intracellular transport of protein A.

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