Answer: The three organelles involved in protein synthesis are nucleus, ribosomes and endoplasmic reticulum.
Step-by-step explanation:
Nucleus- DNA replication takes place in the nucleus and DNA is transcribed to make messenger RNA(mRNA) signals to start protein synthesis which occur in ribosomes in the cytoplasm of the cell.
Ribosomes- Ribosomes contribute in protein synthesis by translating the genetic code transcribed in mRNA into an amino acid sequence, which determines the arrangement of amino acids in proteins.
Endoplasmic reticulum- The membrane of ER is the site of production of all the transmembrane proteins and lipids. ER serves as the canonical pathway in protein synthesis.