Here's why:
* Ribosomes are the protein synthesis factories of the cell. They read the genetic code from messenger RNA (mRNA) and use it to assemble amino acids into specific protein chains.
* The process starts with transcription: The DNA in the nucleus contains the genetic code for protein synthesis. This code is copied into mRNA, which then travels out of the nucleus to the cytoplasm.
* Ribosomes bind to the mRNA: Once in the cytoplasm, ribosomes attach to the mRNA molecule. They read the code in groups of three nucleotides (codons).
* Translation: Each codon corresponds to a specific amino acid. Ribosomes use this code to link together the amino acids, forming a polypeptide chain.
* Folding and modification: After the polypeptide chain is complete, it may fold into a specific shape and undergo further modifications to become a functional protein.
So, while the process of protein synthesis involves several other organelles (like the nucleus and the endoplasmic reticulum), the ribosome is the key player that initiates the process.
