1. Chapter 13 section 1: RNA and Transcription

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

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

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

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

6. Transcription = DNA  mRNA

7. 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

8. Transcription

9. Editting Introns  cut out Exons  left in

10. 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