RNA transcription Notes

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RNA transcription Notes
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RNA

• Ribonucleic Acid

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RNA Structure

• Composed of nucleotides

P
Base

• Sugar

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RNA Structure

• 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
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RNA DNA
Deoxy
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RNA Structure

• Single Stranded
• (only one strand)

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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.
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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.

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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
• AU
• CG

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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
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(No Transcript)
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Central Dogma