What material does the transcription process create? Can You Tell Me? During transcription, what molecule “reads” the DNA? 3. During DNA replication, what molecule “reads” the strand of DNA to make the matching strand? 2. Messenger RNA mRNA Made when cells need a protein made Delivers protein making instructions from gene to translation site Instructions written in codons The GENETIC CODEĬodons Three nucleotide sequences along mRNA 64 possible codons Each corresponds to: An amino acid OR A stop signal OR A start signal The GENETIC CODEġ. Many identical RNA molecules are made simultaneously Feather like appearance in photos TRANSCRIPTION ![]() DNA helix zips itself back up as RNA polymerase passes by TRANSCRIPTION As RNA polymerase works, a single strand of RNA grows TRANSCRIPTION RNA polymerase reaches stop signal at end of gene 5. RNA polymerase reads genes- adds and links matching nucleotides by base pairing (A-U and G-C) TRANSCRIPTION RNA polymerase unwinds and opens DNA double helix TRANSCRIPTION RNA polymerase binds to start signal “promoter” on DNA 2. Transcription Transfers info from a gene on DNA to RNA In prokaryotes- occurs in cytoplasm In eukaryotes- occurs in nucleus TRANSCRIPTION Gene Expression Protein synthesis Protein making process based on information encoded in DNA Decoding the Information in DNA Translation Two types of RNA are used to read instructions on RNA molecule and put amino acids together to make the protein Decoding the Information in DNA Transcription Instructions for making protein are transferred from a gene to an RNA molecule Decoding the Information in DNA Thymine replaced by uracils (which pairs with adenine) Decoding the Information in DNA Contains 5C ribose sugar (one more oxygen than DNA) Decoding the Information in DNA Single stranded Decoding the Information in DNA Nucleic acid made of nucleotides linked together 2. Evaluate three ways that point mutations can alter genetic material. ![]()
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