BIO 101 Week 3 Notes
BIO 101 Week 3 Notes BIO 101N
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This 3 page Class Notes was uploaded by Abigail Davis on Monday September 21, 2015. The Class Notes belongs to BIO 101N at Central Michigan University taught by Pangle, Wiline in Fall 2015. Since its upload, it has received 34 views. For similar materials see General Biology in Biology at Central Michigan University.
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Date Created: 09/21/15
915 Protein Synthesis Only Uses Genes Gene sequence of nucleotides of DNA that codes for proteins 2 of DNA Transcription happens in the nucleus Only reads one strand Cap and Tail needed to exit nucleus RNA Polymerase enzyme 39 t RNA polymerase DNAis quot I Coding A DNA is reweund WEN 393 j unwound Template 39 39 strand Matching nucleotide is added l ll g RNA strand created quotl l ll l l J L httpswwwgooglecomsearch qtranscriptionampbiw1280ampbih633ampsourcelnmsamptbmischampsaXampvedOCA cQAUoAmoVChMerahPX8xleAQiSCh3gawMbtbmischampqsimpletranscripti ondiagramampimgrcv5WaWellUGCd5M3A Translation Takes place in Cytoplasm mRNA enters ribosome 3 nucleotides at a time Group of 3 nucleotides codons Attracts transfer RNA tRNA Bring Speci c Amino Acids to Ribosome Amino Acid depends on fold of tRNA which depends on bottom 3 nucleotides gt Bottom 3 nucleotides of tRNA Anticodon tRNA enters ribosome and matches to mRNA mRNA moves down in tunnel to make ready for next codon anticodon matching next tRNA brings different amino acid 2 amino acids bond together very strongly when ribosome is full tRNA leaves to get another amino acid 1st codon moves out to make room for 3rd codon Process repeats until all codons go through ribosome Ribosome empties leaving you with a protein as a nished product Filip Fi unk1 f i L g 7 Im IIIElquot Elli mi httpswwwgooglecomsearch qtranscriptionampbiw1280ampbih633ampsourcelnmsamptbmischampsaXampvedOCAcQ AUoAmoVChMerahPX8xleAQiSCh3gawMbtbmischampqsimpetranslationdiag ramampimgrcgD4ohOGALdn8M3A Genetic Code Universal all the different combinations of 3 nucleotides codons have a speci c amino acid that matches to it GCC AAGA uuu ATP Source of energy that cells use Lots of enzymes are involved 917 DNA Regulation Expression Genetic Code set of rules relating nucleotide sequence to an amino acid sequence Universal for all animals Each codon speci es a certain amino acid Hard copy storage of info to make proteins 1 gene 1 mRNA 1 Protein Only a hand full of human traits follow the 1 gene 1 protein 1 gene can make multiple proteins Environment matters affects gene expression 0 Nature vs Nurture Predatory vs Nonpredatory environment Height is not one gene Skin Color 3 genes Eye Color 2 genes Genes can turn on amp off We share 98 of DNA with Chimps Pigment takes a while to be expressed in humans 0 Blue eyes is almost the absence of pigment Gene Regulation Control of gene expression Turning genes on or off Every step in Protein Synthesis can be stopped amp Gene turns off 0 Molecule can attack nished protein 0 Molecule attaches to chromosome so it can t unpack Take off or don t put on cap amp tail of mRNA mRNA Processing Exons exit nuceusntrons do not leave nuceus splicing CapsTails Alternate Splicing Can splice proteins different ways this leads to 1 gene coding potentially for multiple proteins Exome sequencing test to nd what is wrong with protein synthesis everything that becomes a protein Central Paradigm DNA gt RNA gt Protein 1 Gene gt 1 Protein gt 1 Function Process is not this straight forward Stem Cell A genes are turned on In Embryo all cells express a DNA then specialize and turn off genes it does not need 0 cells are called totipotent
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