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DNA Flashcards

Pretty much everything related to DNA because I procrastinated in making this set. Whoops....

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1850880938Nucleic acidsin all living cells, stores and transmits genetic information, 2 types0
1850880939DNAcontrols how you act and look, provides info for the cell1
1850880940RNAmakes proteins, transports info through the nuclear pores2
1850880941DNA NucleotidesDeoxyribose sugar, phosphate group, one nitrogenous base3
1850880942RNA NucleotidesRibose sugar, phosphate group, one nitrogenous base4
1850880943nitrogenous bases held together byhydrogen bonds5
1850880944strand held together bycovalent bonds6
1850880945DNA basesAdenine, thymine, guanine, cytosine7
1850880946RNA basesAdenine, uracil, cytosine, guanine8
1850880947(DNA) A-T9
1850880948G-C10
1850880949(RNA) A-U11
1850880950Purinesadenine and guanine, two rings each12
1850880951Pyrimidinescytosine, uracil, and thymine, one ring each13
1850880952Replicationprocess during which DNA is duplicated14
1850880953Replication steps1. Helicase unwinds DNA 2. DNA polymerase brings matching bases and proofreads DNA 3. Ligase finishes strands15
1850880954Production or transcriptionprocess during which RNA is created, happens inside nucleus16
18508809553 types of RNAmRNA, tRNA, rRNA17
1850880956mRNA functiontakes genetic code for protein production from DNA to ribosome18
1850880957tRNA functioncarries amino acids to the ribosome19
1850880958rRNAwith protein it composes ribosome20
1850880959Replication must occur beforemitosis21
1850880960Protein synthesisprocess of decoding DNA and making a protein22
1850880961genecoded DNA instructions that control the production of proteins, sequence of amino acids determines your traits23
1850880962TranscriptionRNA polymerase copies the sequence of nucleotides in DNA to make mRNA, happens inside of nucleus24
1850880963Transcription stepsRNA polymerase separates DNA reads DNA creates mRNA25
1850880964Translationprocess of decoding mRNA into amino acids, happens inside ribosomes26
1850880965Translation stepsmRNA moves from nucleus to ribosome mRNA attaches to rRNA tRNA carrying amino acid attaches to mRNA tRNA and mRNA attach, forms protein27
1850880966codon3 nucleotide/base code for amino acid on mRNA28
1850880967anti-codon3 nucleotide/base code for amino acid on tRNA29
1850880968Gene expressionprocess by which a gene produces its product and the product carries out its function30
1850880969Gene regulationthe regulation of genes allows cells to better respond to stimuli a nd conserve energy/materials31
1850880970Prokaryotic cells turn genes on/off by controllingtranscription32
1850880971transcription and translation happen at the sametime in prokaryotes33
1850880972gene expression mainly regulated at thestart of transcription34
1850880973Start of transcriptioncontrolled by promoters and operators.35
1850880974promoterDNA segment that allows a gene to be transcribed, helps RNA pol find where gene starts36
1850880975operatorDNA segment that turns a gene on/off If it says "yes", cell makes mRNA. if it says "no", then nothing happens Acts as a stoplight saying when the cell can "go" and make mRNA37
1850880976operonpromoter, operator, all genes for proteins needed to do task38
1850880977Lac Operoncontains 3 genes coding for enzymes used to break down lactose, genes transcribed on one mRNA, acts as one unit.39
1850880978When lactose is absentlac operon switched off to prevent transcription and save cell's resources40
1850880979repressorbinds to operator, preventing RNA pol from transcribing gene41
1850880980When lactose is presentlac operon switched on to allow transcription42
1850880981lactose binds to repressor proteinchanges its shape, causes repressor to fall off operator, then RNA pol binda and transcribes genes43
1850880982Transcription factorsrecognize regulatory DNA strands, bind to DNA strand, help RNA pol know where gene starts44
1850880983TATA boxseven nucleotide promoter, in most eukaryotes, (TATAAAA)45
1850880984Enhancerssequences that speed up transcription46
1850880985silencersslow transcription47
1850880986genes can control...the regulation of other genes48
1850880987mRNA processingbefore leaving nucleus, introns are cut out and exons bound together49
1850880988exonsnucleotide segments coding for parts of protein50
1850880989intronsnoncoding regions of DNA, unneeded, acts as buffer, can increase genetic diversity without increasing DNA strand size when mRNA strands are cut at different points51
1850880990capadded to mRNA so ribosome knows where to bind and prevent the immediate breakdown of DNA52
1850880991tailadded to help mRNA exit nucleus53
1850880992Cell differentiationprocess by which unspecialized cells develop into specialized cells, caused by gene expression54
1850880993Internal factorsinside of the cell, like unevenly distributed materials in the egg cell55
1850880994external factorsoutside of cell, temperature, drugs, chemicals, light56
1850880995Gene mutationChange in DNA sequence=change in proteins increase gene variation can be good or bad57
1850880996mutagenssomething outside the body that causes mutations58
1850880997Frameshift mutationsadding or deleting nucleotides affects EVERY AMINO ACID FOLLOWING the mutation deletion, insertion, translocation, duplication59
1850880998Deletionframeshift, deletes nucleotide in base sequence60
1850880999Insertionframeshift, adding a nucleotide into DNA strand61
1850881000Translocationframeshift insertion, taking section of DNA from another part62
1850881001Duplicationframeshift insertion, duplicating a nucleotide in the base sequence63
1850881002Point mutationschanges in 1 or a few nucleotides affects ONLY the amino acid at the mutation, all other amino acids remain the same substitution and inversion64
1850881003substitutionpoint, substitute a nucleotide for another65
1850881004Inversionpoint, inserting or flipping a section of nucleotides66
1850881005Silent mutationsmutation still codes for the same amino acid as the original strand EG CUG= leu CUA= leu67
1850881006Nonsenseresults in stop codon, causes shortened protein68
1850881007missenseone or more amino acids changed, may cause malfunctioning problem69
1850881008Can a strand of DNA have more than one mutation?YES70

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