Multiple Choice
Which of the following is not a type of cell adhesion molecules?
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18. Cell Junctions and Tissues
Cell-Cell Adhesion
Multiple Choice
In the context of cell-cell adhesion, which cell-surface molecules are primarily responsible for cell-to-cell recognition during tissue formation and immune interactions?
A
Mitochondria, which signal recognition by releasing ATP into the extracellular space
B
Cell adhesion molecules (CAMs), such as cadherins and selectins, that mediate specific binding between cells
C
Lysosomes, which recognize other cells by secreting digestive enzymes to the cell surface
D
Ribosomes, which identify neighboring cells by matching mRNA sequences across membranes
Verified step by step guidance1
Understand the context of the question: it asks about molecules on the cell surface responsible for cell-to-cell recognition during tissue formation and immune interactions.
Recall that cell-cell recognition involves specific interactions between proteins on the surfaces of adjacent cells, which allow cells to identify and bind to each other.
Identify the main types of cell adhesion molecules (CAMs) involved in this process, such as cadherins, which mediate calcium-dependent adhesion important in tissue formation, and selectins, which play a key role in immune cell interactions.
Exclude organelles like mitochondria, lysosomes, and ribosomes, as they are intracellular and do not function in direct cell-to-cell recognition on the cell surface.
Conclude that CAMs, including cadherins and selectins, are the primary molecules responsible for cell-to-cell recognition in the contexts described.
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