In the Ribosomes.
Proteins are made by the ribosomes either free in the cytoplasm (soluble proteins) or docked on the endoplasmic reticulum, after a small amount is initially translated in the cytoplasm (proteins that are destined to be secreted out of the cell, incorporated into the plasma membrane, retained in the endoplasmic reticulum or Golgi complex. Proteins that traverse through the endoplasmic reticulum are further modified in the endoplasmic reticulum and Golgi complex.
Responding the original question: "What is responsible for protein synthesis?", we can consider 3 participants in what it's called "Translation process" or biosynthesis of peptides (proteins): 1) the mRNA molecule to be translated; 2) the tRNAs carrying an amino acid molecule to be added to the growing peptide molecule; and 3) the ribosome, the structure where the translation is taken place.
Protein synthesis, or the creation of protein happens in the ribosome of a cell.
buguk
Cell membrane pores are made up of protein.
The cell membrane is made of carbohydrate, lipid, and protein molecules.
New protein molecules are made in the cytoplasm of the cell.
mitochondria
It is made up of protein and lipids
Protein is made in the rough endoplasmic reticulum and the cytoplasm by the ribosomes using mRNA.
Nucleus
Ribosomes
Protein is made in the ribosome.
New protein molecules are made in the cytoplasm of the cell.
PROTEIN!!!!!!!!!!!!!!!!!!!!!!!!!
cytoskeleton