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AP Biology Protein Synthesis Flashcards

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9605713472TranscriptionProcess that converts DNA Nucleic Acid language into RNA Nucleic Acid language.0
9605713473RNA Structure• Ribose sugar. • Nitrogen bases: Uracil, Adenine, Cytosine, Guanine. • Single stranded.1
9605713474Types of RNA• mRNA • tRNA • rRNA • siRNA2
9605713475Template StrandTranscribed DNA strand; the strand of DNA that is temporarily paired with the RNA.3
9605713476Coding StrandUntranscribed DNA strand; same sequence as RNA.4
9605713477Transcription BubbleWhere DNA unzips for transcription to begin.5
9605713478RNA Polymerase IOnly transcribes rRNA genes; makes ribosomes.6
9605713479RNA Polymerase IITranscribes genes into mRNA. Enzyme which reads genes responsible for most of mRNA7
9605713481Promoter RegionBinding site before beginning of gene; for RNA Polymerase and transcription factors.8
9605713482TATA Box Binding SiteA DNA sequence in eukaryotic promoters crucial in forming the transcription initiation complex.9
9605713483Enhancer RegionBinding site far upstream of gene. Turns transcription on HIGH.10
9605713484Initiation ComplexTranscription factors bind to promoter region. Trigger the binding of RNA Polymerase to DNA.11
9605713485ExonsThe real gene; expressed/coding DNA.12
9605713486IntronsThe junk genetic material; INbetween sequence.13
9605713487mRNA SplicingPost-transcriptional processing; edits out introns.14
9605713488Pre-mRNAPrimary transcript of the process.15
9605713489Mature mRNAThe final product of mRNA splicing.16
9605713490snRNPsSmall nuclear RNA; proteins. Responsible for splicing RNA.17
9605713491SpliceosomeSeveral snRNPs. Recognize splice site sequence. "Cut and paste" gene.18
9605713492Alternative SplicingAlternative mRNAs produced from same gene; different segments treated as exons.19
9605713493Post-Transcriptional ProcessingNeed to protect mRNA on its trip from nucleus to cytoplasm; enzymes in cytoplasm attack mRNA.20
9605713494mRNA Caps5' GTP Cap and Poly-A Tail; longer tail, mRNA lasts longer: produces more protein.21
9605713495Reading FrameReading mRNA nucleotides in the correct groupings. If a single base is added or lost, it throws off the entire reading frame.22
9605713496TranslationFrom nucleic acid language to amino acid language.23
9605713497CodonA sequence of three nucleotides in mRNA that codes for a specific amino acid.24
9605713498Start CodonsAUG and Methionine.25
9605713499Stop CodonsUGA, UAA, and UAG.26
9605713500Anti-CodonGroup of three bases on a tRNA molecule that are complementary to an mRNA codon.27
9605713501tRNATransfer RNA: follows its complementary codon, carries a specific attached amino acid.28
9605713502RibosomesFacilitate coupling of tRNA anticodon to mRNA codon. Organelle/enzyme hybrid.29
9605713503Structure of RibosomesRibosomal RNA (rRNA) and proteins. Large and small subunits.30
9605713504A SiteHolds tRNA carrying next amino acid to be added to chain.31
9605713505P SiteHolds tRNA carrying growing polypeptide chain.32
9605713506E SiteExit site. Empty tRNA leaves ribosome from exit side.33
9605713507InitiationBrings together mRNA, ribosome subunits, initiator tRNA.34
9605713508ElongationAdding amino acids based on codon sequence.35
9605713509TerminationEnd codon.36
9605713510Protein Synthesis in ProkaryotesTranslation and transcription coupled, translation begins before transcription is completed.37

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