Answer: Rrna is a part of ribosome that helps make protein and also links amino acids.
Explanation:
I would believe the correct responses would be option 1,2,4.
Answer:
Cell surface receptors (membrane receptors, transmembrane receptors) are receptors that are embedded in the plasma membrane of cells. They act in cell signaling by receiving (binding to) extracellular molecules. They are specialized integral membrane proteins that allow communication between the cell and the extracellular space.
Explanation:
Check on google they will give you the answer and others descriptions