Here's how it works:
1. DNA in the nucleus contains the genetic code. This code is a sequence of nucleotides that determines the order of amino acids in a protein.
2. Transcription: The DNA code is transcribed into a messenger RNA (mRNA) molecule. This mRNA molecule carries the genetic code from the nucleus to the cytoplasm.
3. Translation: The ribosome attaches to the mRNA molecule. The ribosome reads the mRNA code, three nucleotides at a time (called codons). Each codon specifies a particular amino acid.
4. Amino acid delivery: Transfer RNA (tRNA) molecules bring the appropriate amino acids to the ribosome. Each tRNA molecule has an anticodon that matches a specific codon on the mRNA.
5. Protein synthesis: The ribosome connects the amino acids together in the order specified by the mRNA code, forming a polypeptide chain. This chain eventually folds into a specific three-dimensional structure, which is the functional protein.
So, ribosomes are like protein factories, using the instructions from the nucleus (the blueprint) to build the protein molecules the cell needs.
