1. Cell Structure

Cell Junctions — Quiz

Test your understanding of cell junctions with 5 practice questions.

Practice Questions

Question 1

Which type of cell junction is primarily responsible for forming a diffusion barrier that restricts the movement of membrane proteins and lipids between the apical and basolateral domains of epithelial cells?

Question 2

The transmembrane proteins of desmosomes belong to which family of cell adhesion molecules, and what cytoskeletal filaments do they connect to?

Question 3

In a tissue where rapid and coordinated electrical signaling is essential, such as cardiac muscle, which type of cell junction would be most abundant to facilitate the quick propagation of action potentials?

Question 4

Which of the following statements accurately describes the molecular composition and function of adherens junctions?

Question 5

A mutation in the gene encoding for a specific type of cadherin protein leads to a severe blistering disease where epithelial cells lose their strong adhesion to one another. Which type of cell junction is most likely affected by this mutation, and what is the primary consequence?