D. Water is polar-convalently bonded, not by van der Waal forces.
B = the fundamental and distinctive characteristics or qualities of someone or something, especially when regarded as unchangeable give me brainest answer please
Answer:
Cell membrane.
Explanation:
Cytokines may be defined as the small molecules that plays an important role in the cell signalling as well as in the immune system as well. They are made of the peptides.
Pattern recognition receptor are important molecules that plays an important role in the innate immunity. These receptors are present on the surface of the cells like macrophages and monocytes. These receptors are made of the proteins and cannot pass the lipid bilayer. Hence, these receptors are located on the surface of the cell membrane.
Thus, the answer is cell membrane.
