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Which hormone is involved in Ca2+ metabolism and bone growth?

As discussed in this section, mutations in the LDL receptor can cause familial hypercholesterolemia. However, mutations in apolipoprotein B100 have also been discovered that cause hypercholesterolemia. For example, mutation of arginine-3500 to glutamine (R3500Q) in apolipoprotein B100 was one of the first such mutations. Which of the following is an appropriate hypothesis for how apolipoprotein B100 mutations cause hypercholesterolemia?

Which type of cell–cell interaction is responsible for maintaining the correct localization of glucose transporters in polarized intestinal epithelial cells?

A mutation in an epithelial cell leads to the expression of β4 integrin with a deleted cytoplasmic domain. How would this mutation affect adhesion of epithelial cells to basal laminae?

Which of the following is not one of the functions of the cytoskeleton?

Which statement about ion channels is true?

Chitin is a linear polymer of?

Which statement about myosin I is true?

In the “pulse-chase” experiment, Palade and colleagues studied the pathway taken by newly secreted proteins in pancreatic acinar cells by labeling them with radioactive amino acids, removing unused label, and determining their location within the cells at various time points. Which sequence represents the correct order in which the proteins were identified?

Which proteins bind to the extracellular matrix to secure focal adhesions?