COMPARING RNA DNA Biology CP Phyllis Smith Comparing
COMPARING RNA & DNA Biology CP – Phyllis Smith
Comparing RNA & DNA RNA Nucleotide X X X Deoxyribose Ribose X Single-stranded Doublestranded Nitrogenous bases X X
Comparing RNA & DNA Thymine RNA X Uracil Template for synthesis of nucleic acid Double helix Replication Transcription X X X
Comparing RNA & DNA Exact Copy RNA X Messenger More Than 1 Form Found in Nucleus Leaves Nucleus Does not Leave X X X
Interpreting Diagrams: Understanding the Main Ideas DNA codon AAA GTC CCT TAC m. RNA codon t. RNA Anticodon UUU CAG AAA GUC GGA CCU AUG UAC GAT CUA CAC GUG GAU CAC Amino Acid Phenylalanine Glutamine Glycine Methionine Leucine Valine
13. 1 AND 13. 2
RNA synthesis Transcription: Similar to DNA Replication 1. DNA DOUBLE HELIX Unwinds 2. DNA DOUBLE HELIX Unzips 3. RNA Polymerase uses 1 STRAND to create m. RNA Use Promoters – tell the RNA polymerase where to stop and where to end KEY DIFFERENCE: Only uses one strand from parental DNA NOT BOTH!
INTRONS and EXONS Pre –m. RNA must be edited
2 types of RNA m. RNA = messenger RNA t. RNA = transfer RNA Same rules of pairing for both m. RNA and t. RNA How are the base pairing rules different from DNA?
DNA or RNA? CCC – GGG DNA, RNA, or Both? CAT – GUA DNA, RNA, or Both? UUU – AAA TGC – ACG DNA, RNA, or Both?
The Genetic Code Nucleotides bases = A, C, G, T (U in RNA) Codon 3 nucleotide bases (or letters) = 1 word Letters of RNA: A, C, G, and U U =? U pairs with ?
- Slides: 13
