RNA transcription Notes

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Presentation transcript:

RNA transcription Notes

RNA Ribonucleic Acid

RNA Structure Composed of nucleotides P Base Sugar

RNA Structure DNA A T C G A C A A T T C G mRNA U A G C U G U U A A G C Bases: Uracil Replaces Thymine A = U (Uracil) C = G DNA A T C G A C A A T T C G mRNA U A G C U G U U A A G C

RNA DNA “Deoxy”

RNA Structure Single Stranded (only one strand)

RNA Transcription Textbook Definition: First stage of protein synthesis. An RNA stand is assembled on exposed bases of an unwound strand of a DNA double helix. Transcription = the process of building an RNA copy of a DNA sequence.

DNA replication vs. RNA transcription RNA is single stranded U replaces T in RNA RNA Transcription only happens in small sections (one gene). DNA replication copies the whole strand.

6 Steps of Transcription Enzyme untwists the DNA and starts transcription 2. Enzyme unzips DNA (transcription bubble) 3. Free RNA nucleotides base pair w/ DNA A=U C=G

4. RNA nucleotides bond together at the backbone 5. New single strand RNA detaches from DNA template 6. Enzyme closes (re-zips) and twists DNA

Central Dogma