Chapter 13 section 1: RNA and Transcription. Key Questions How does RNA differ from DNA? How does the cell make RNA?

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Presentation transcript:

Chapter 13 section 1: RNA and Transcription

Key Questions How does RNA differ from DNA? How does the cell make RNA?

RNA 4 Differences: 1. Single Strand 2. Ribose 3. Uracil (U) 4. Cytoplasm

Types of RNA 1.mRNA (messenger) 2.tRNA (transfer) 3.rRNA (ribosomal)

Ribosomes Most numerous organelle No membrane Made of protein and RNA Free within cytoplasm and on ER Synthesize proteins

Transcription = DNA  mRNA

Steps of Transcription 1.RNA Polymerase Promoter Unwinds & unzips 2. Complimentary nucleotides attached A-U, T-A, G-C, C-G 3. RNA Polymerase—zips and rewinds

Transcription

Editting Introns  cut out Exons  left in

Transcribe: C G C A T T C G A T A C G C G U A A G C U A U G

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