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Section 13.1 RNA and Transcription I. Structure of RNA 1. RNA: (Ribonucleic Acid) will carry genetic info from DNA in nucleus to the cytosol a) 2. Helps __________________________ 3 components: I. Structure of RNA 3. Nitrogen base Thymine is replaced with a new base- Uracil ( U ) a) Uracil : b) Guanine : Cytosine RNA A) Types of RNA 1. 3 types of RNA a) Messenger RNA (mRNA): b) Transfer RNA (tRNA): c) Ribosomal RNA (rRNA): II. Transcription 1. Transcription: process where genetic info is copied from DNA into RNA a) “__________________” A. Steps of Transcription RNA polymerase binds to a ________ to break 2 strands of DNA apart 1. a) RNA polymerase: enzyme that b) Promoter: location where A. Steps of Transcription 2. 3. 4. RNA polymerase will bind to 1st nucleotide of DNA Complementary RNA nitrogen bases will attach to one DNA strand Transcription will stop when: A. Steps of Transcription 5. RNA polymerase will separate from DNA and RNA B. Products of Transcription 1. End products a) mRNA, ______, rRNA 2. Only mRNA will move the message from the nucleus to the ___________