What is required for cellular protein synthesis?

What is required for cellular protein synthesis?

• A. Free amino acids from the cytosol, with ribosomes and other factors
• B. Free fatty acids from the mitochondria
• C. Glucose only
• D. Nucleotides alone

Answer: (A)

Protein synthesis needs amino acids as the building blocks, and the ribosomes with all the translation machinery read the genetic template to link those amino acids into a polypeptide. The amino acids come from the cytosol, and tRNA brings each specific amino acid to the ribosome while mRNA provides the sequence. Initiation, elongation, and termination steps require energy in the form of ATP and GTP and various factors to drive the process. Other components like fatty acids or glucose don’t provide the actual building blocks or the full translation machinery, and nucleotides alone aren’t sufficient to make a protein. So the essential requirement is free amino acids in the cytosol together with ribosomes and the necessary factors to carry out translation.

Protein synthesis needs amino acids as the building blocks, and the ribosomes with all the translation machinery read the genetic template to link those amino acids into a polypeptide. The amino acids come from the cytosol, and tRNA brings each specific amino acid to the ribosome while mRNA provides the sequence. Initiation, elongation, and termination steps require energy in the form of ATP and GTP and various factors to drive the process. Other components like fatty acids or glucose don’t provide the actual building blocks or the full translation machinery, and nucleotides alone aren’t sufficient to make a protein. So the essential requirement is free amino acids in the cytosol together with ribosomes and the necessary factors to carry out translation.