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Unformatted text preview: RNA -Differs from DNA in that: o Ribose sugarThing RNA is named for is Ribose sugar o Single Strandedtypically only one backbone, therefore does not form a double helix o Uracil instead of thymine Types of RNA-Messenger RNA: mRNA-Ribosomal RNA: rRNA -Transfer RNA: tRNA mRNA-Transcribed from DNA (true for all RNAs) -Contains the code to build one polypeptide chain -Specific; 1 piece of mRNA is going to make one specific polypeptide chain Transcription-RNA polymerase binds to the promoter site (TATA box)-Figure 17.8 -RNA polymerase builds the new strand 5 to 3 with complementary RNA nucleotides -Anti-parallel -Figure 17.7-When RNA polymerase reaches the termination sequence it leaves the DNA and so does the RNA -Only one backbone of DNA transcribed Clicker: The DNA sequence 5ATTGC would be transcribed as? 3UAACG...
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