1. Initiation:
* RNA polymerase, an enzyme, binds to a specific region of DNA called the promoter. This is like a "start" signal for the process.
* The DNA molecule unwinds, separating the two strands.
2. Elongation:
* RNA polymerase moves along the DNA template strand, reading the genetic code.
* It uses this information to build a complementary RNA molecule, using ribonucleotides (A, U, G, C).
* The RNA molecule grows, incorporating the correct nucleotides in the order specified by the DNA template.
* Remember, RNA uses uracil (U) instead of thymine (T).
3. Termination:
* RNA polymerase reaches a specific sequence of DNA called the terminator. This signals the end of the gene.
* The RNA molecule is released from the DNA template.
Key Points:
* Transcription occurs in the nucleus of eukaryotic cells.
* The RNA molecule produced is called messenger RNA (mRNA).
* mRNA then travels out of the nucleus to the cytoplasm, where it will be used to make proteins.
Simplified Analogy:
Think of DNA as a recipe book and RNA as a copy of that recipe. Transcription is the process of copying the recipe (DNA) so that it can be taken to the kitchen (cytoplasm) to make the meal (protein).
