Answer and Explanation:
Translation is the process by which genetic information encoded in the form of mRNA is converted into a sequence of amino acids to synthesize a protein. It occurs in the cytoplasm of cells and involves several key steps:
1. Initiation: The process begins when the small ribosomal subunit binds to the mRNA molecule near the start codon. The initiator tRNA, carrying the amino acid methionine, binds to the start codon on the mRNA. The large ribosomal subunit then joins, forming a complete ribosome.
2. Elongation: During elongation, the ribosome moves along the mRNA molecule, reading the codons and bringing in the appropriate tRNAs with matching anticodons. Each tRNA carries a specific amino acid, which is added to the growing polypeptide chain. The ribosome facilitates the formation of peptide bonds between adjacent amino acids, linking them together.
3. Termination: The termination stage occurs when the ribosome reaches a stop codon (UAA, UAG, or UGA) on the mRNA. At this point, a release factor protein binds to the stop codon, causing the newly synthesized protein to be released from the ribosome. The ribosome then dissociates into its subunits, ready to initiate translation again.
Overall, the process of translation converts the genetic code carried by mRNA into a specific sequence of amino acids, ultimately leading to the synthesis of a functional protein. This process is crucial for the functioning of cells and is tightly regulated to ensure accurate and efficient protein production.