serve as sites for protein synthesis
they are sites of protein synthesis in the cell; ..
are where RNA is translated into protein. This process is called protein synthesis. Protein synthesis is very important to cells, therefore large numbers of ribosomes are found in cells. Ribosomes float freely in the cytoplasm, and are also bound to the endoplasmic reticulum (ER). ER bound to ribosomes is called rough ER because the ribosomes on the ER give it a rough sandpaper like look.. These organelles are very small, made up of 50 proteins and several long RNAs bound together. Ribosomes do not have a membrane. Ribosomes fall into two seperate units while not synthesizing protein.
09/01/2018 · Keep Learning
These are composed of proteins and ribosomal RNA (rRNA), the most abundant RNA in the cell.
Each ribosome has a binding site for mRNA and three binding sites for tRNA molecules.
The P site holds the tRNA carrying the growing polypeptide chain.
The A site carries the tRNA with the next amino acid.
Discharged tRNAs leave the ribosome at the E site.
RNA is the catalyst for peptide bond formation.