BIOL 303 Lecture Notes - Lecture 28: Thymine, Transfer Rna, Uracil

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A pairs with t for dna coding strand, or instead pairs with u for rna. Use part of the dna to code in for an rna. Have a gap and then the next gene and so forth. Dna replication with an enzyme that knocks off the hydroxide components. Rna molecules have a more complicated shapes. There are three major types of rna: Messenger rna or mrna : encodes amino acid sequence. Other classes of rna control gene expression. Carries information that specifies a particular protein. Three mrna bases a row form of a codon which specifies a particular amino acid. Differentiated cells produce certain mrna molecules called transcripts: Information in the transcripts is used to manufacture the encoded proteins. Most rrnas are from 100-3,000 nucleotides long. Ribosomes consists of two subunits that join during protein synthesis. Some are catalysts ( ribozymes ) and others help align the ribosome and mrna. Binds an mrna codon and a specific amino acid.

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