Final answer:
Adherens junctions are the structures that link cells together and require integrin protein. They act like 'superglue' to anchor cells and are crucial for maintaining the structural integrity of tissues.
Step-by-step explanation:
The structures that link cells together and require integrin protein are known as adherens junctions. These junctions are not only essential for maintaining the structural integrity of tissues but also play a critical role in cell communication and signaling. Integrin proteins are centrally involved in the adherens junctions that link to the extracellular matrix, and this is where they differ from desmosomes, which instead use cadherins for cell-to-cell adhesion. The statement that compares them to 'superglue' is characteristic of adherens junctions' function to anchor cells firmly together, yet allows for some flexibility.
Therefore, the correct answer to the question is 'What are structures that link cells together which require integrin protein?' is c) Adherens; Tight; anchor.