* DNA contains the genetic code: DNA stores the blueprint for building proteins. This blueprint is encoded in the sequence of its four nucleotide bases (adenine, guanine, cytosine, and thymine).
* Transcription: The first step in protein synthesis is transcription, where DNA's genetic code is copied into a messenger RNA (mRNA) molecule. This mRNA molecule is a single-stranded copy of the DNA segment that contains the instructions for building a specific protein.
* Translation: The mRNA then travels from the nucleus to the ribosomes, the protein synthesis machinery of the cell. Here, the mRNA code is read by ribosomes, and the correct amino acids are brought together to form the protein.
* Transfer RNA (tRNA): Transfer RNA molecules (tRNAs) act as adapters, bringing specific amino acids to the ribosome based on the mRNA code.
Therefore, DNA provides the blueprint, but it's RNA (specifically mRNA and tRNA) that directly interacts with ribosomes to assemble proteins. This complex interplay of DNA, RNA, and ribosomes ensures that proteins are synthesized according to the instructions encoded in our genes.
