DNA → RNA → Protein
Here's a breakdown of each step:
* DNA (Deoxyribonucleic Acid): This is the blueprint of life, containing the genetic instructions for an organism. It's a double-stranded helix made up of nucleotides, which are the building blocks of DNA.
* Transcription: This is the process of copying the DNA sequence into a messenger RNA (mRNA) molecule. mRNA is a single-stranded molecule that carries the genetic information from the DNA in the nucleus to the ribosomes in the cytoplasm.
* Translation: This is the process of converting the mRNA sequence into a chain of amino acids, which then fold into a protein. Each three-nucleotide sequence on the mRNA (called a codon) codes for a specific amino acid.
Key points:
* Exceptions to the Central Dogma: While the Central Dogma generally holds true, there are exceptions. Some viruses have a reverse transcription process, where RNA is used to create DNA.
* Flow of Information: The flow of genetic information from DNA to RNA to protein is essential for all life. It enables cells to produce the proteins they need to function, grow, and reproduce.
In summary: The Central Dogma of Molecular Biology describes the fundamental flow of genetic information in living organisms. It highlights the crucial role of DNA, RNA, and proteins in the creation and expression of life's characteristics.
