What makes proteins in a cell?

Hint: Ribosomes are called protein manufacturing factories. Protein is an important substance in the human body. It is used for transport and storage. It also acts as an enzyme and messenger. These proteins are used to repair and build the body tissues. It also maintains proper pH and fluid balance in the human body. Proteins are the important thing in growth. But excess amounts may lead to fat and liver problems.

Complete answer:
Proteins are coded by genes in the cell. It plays a central role in the biological process. In ribosomes protein synthesis takes place. The rRNA molecule is stitched with amino acid to make a protein molecule. rRNA is also called the ribosome RNA or catalytic RNA. Ribosomes make protein at the nucleus. So here ribosomes get the signal to start the synthesis process. In a eukaryotic cell the ribosome is half protein or half rRNA.
First step in protein synthesis is called the transcription. Ribosomes are called the macro molecular machine and it is found in all living beings. Ribosome is found as the floating one at the cytoplasm. Ribosomes use amino acid monomers to build the protein polymers.

Ribosomes are called protein manufacturing factories, because they are responsible for synthesizing proteins in the cell.

Note:
Protein is used as the catalyzer in the biological reaction. It transports molecules like oxygen and keeps the immune system very healthy. It also transmits messages from cell to cell. It is also maintaining the electrolyte balance during the biological reaction. Proteins are classified by two types. They are fibrous protein and globular protein. The produced enzyme increases the rate of chemical reaction.