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AP Biology Unit 4.4: Protein Synthesis Flashcards

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9297011563GeneA segment of DNA on a chromosome that codes for a specific protein or group of proteins; determines our traits0
9297011564ProteinAn organic compound that is made of one or more chains of amino acids and that is a principal structural and functional component of all cells1
9297011565Amino AcidThe building blocks of proteins2
9297011566NucleotideA building block of DNA, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and a phosphate group.3
9297011567Nitrogenous BasePart of a nucleotide; examples include cytosine, guanine, adenine, thymine (DNA only) and uracil (RNA only)4
9297011568RibosomeCytoplasmic organelles at which proteins are synthesized.5
9297011569DNAA nucleic acid found in the nucleus of all living cells, which carries the organism's hereditary information in the form of genes.6
9297011570RNAA type of nucleic acid consisting of nucleotide monomers with a ribose sugar and the nitrogenous bases adenine (A), cytosine (C), guanine (G), and uracil (U); single-stranded.7
9297011571Messenger RNARNA molecule that carries copies of instructions for the assembly of amino acids into proteins from DNA to the cytoplasm of the cell.8
9297011572Ribosomal RNAType of RNA that combines with proteins to form ribosomes.9
9297011573Transfer RNAType of RNA molecule that transfers amino acids to ribosomes during protein synthesis.10
9297011574TranscriptionProcess whereby the DNA sequence in a gene is copied into mRNA by RNA polymerase.11
9297011575TranslationProcess whereby genetic information coded in messenger RNA directs the formation of a specific protein at a ribosome in the cytoplasm.12
9297011577RNA PolymeraseEnzyme that links together the growing chain of RNA nucleotides during transcription using a DNA strand as a template13
9297011578CodonA three-nucleotide sequence on mRNA that specifies a particular amino acid, start, or termination signal; the basic unit of the genetic code.14
9297011579MethionineAmino acid coded for by the codon AUG; also used as a start signal for translation.15
9297011580Start CodonOn mRNA, the specific three-nucleotide sequence (AUG) to which an initiator tRNA molecule binds, starting translation of genetic information into a protein.16
9297011581Stop CodonCodon that signals to ribosomes to stop translation.17
9297011582AnticodonA triplet of nucleotide bases in transfer RNA that identifies the amino acid carried and binds to a complementary codon in messenger RNA during protein synthesis at a ribosome.18
9297017809PromoterSpecific region of a gene where RNA polymerase can bind and begin transcription19
9297020264Template StrandThe strand of DNA that the RNA polymerase uses as a guide to build complementary mRNA20
9297021938Transcription Initiation ComplexThe completed assembly of transcription factors and RNA polymerase bound to a promoter.21
9297027406Transcription FactorProteins that mediate the binding of RNA polymerase to a promoter and the initiation of transcription22
92970346305' CapModified guanine nucleotide added to the 5' end of a pre-mRNA molecule.23
9297040998Poly(A) TailString of adenine nucleotides added to the 3' end of a eukaryotic mRNA after transcription.24
9297044210ExonucleaseAn enzyme that cleaves nucleotides from either the 3' or the 5' ends of DNA or RNA25
9297046876RNA SplicingThe removal of noncoding portions (introns) of the RNA molecule after initial synthesis.26
9297048787IntronSequence of a eukaryotic gene's DNA that is not translated into a protein; removed during RNA processing27
9297051969ExonSequence of a gene's DNA that are transcribed into protein structures28

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