Final answer:
It is incorrect to equate NCAM (CD56) glycoprotein with immunoglobulins. NCAMs are involved in cell adhesion, particularly in the nervous system, while immunoglobulins are antibodies secreted by B cells to fight pathogens.
Step-by-step explanation:
No, it is not correct to equate NCAM (CD56) glycoprotein with immunoglobulins. While both are glycoproteins, they serve distinct functions within the immune system.
NCAMs, or Neural Cell Adhesion Molecules, are involved in cell-cell adhesion and play a key role in neural development. Their immunoglobulin domains facilitate specific interactions that are crucial for neural connections. On the other hand, immunoglobulins, also known as antibodies, are secreted by B cells and have a primary function of identifying and neutralizing foreign antigens such as viruses and bacteria.
Although NCAMs are part of the immunoglobulin superfamily due to their structural features, such as immunoglobulin-like domains, this does not make them synonymous with immunoglobulins nor with antibodies. Answer option c, only NCAM is part of the immunoglobulin superfamily, is the correct choice.