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Pre-AP Ch. 12

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7547521transformationprocess in which one strain of bacteria appears to change into another one
7547522bacteriophageA virus that infects bacteria
7547523nucleotidemonomer of nucleic acids made up of a 5 carbon sugar, a phosphate group and a nitrogen base
7547524base pairingprinciple that states that only Adenine+ Thymine, Cytosine+ Guanine
7547525chromatinconsists of DNA tightly coiled around proteins
7547526histoneprotein molecule around which DNA is tightly coiled in chromatin
7547527replicationprocess in which DNA makes a copy of itself
7547528DNA polymeraseThe enzyme which puts together the nucleotides in DNA replication
7547529genesequence of DNA that codes for a protein and thus determines a trait
7547530messenger RNARNA molecule that carries copies of instructions for the assembly of amino acids into proteins from DNA to the rest of the cell
7547531ribosomal RNAtype of RNA that makes up the major part of ribosomes
7547532transfer RNAtype of RNA molecule that transfers amino acids to ribosomes during protein synthesis
7547533transcriptiona process that takes place in a cell where DNA acts as a template to form mRNA
7547534RNA polymeraseenzyme similar to DNA polymerase that binds to DNA and seperates the DNA strands during transcription
7547535promoterregion of DNA that indicates to an enzyme where to bind to make RNA
7547536intronsequence of DNA that is not involved in coding for a protein
7547537exonexpressed sequence of DNA; codes for a protein
7547538codona sequence of 3 nucleotides on mRNA that codes for a single amino acid
7547539translationdecoding of an mRNA message into a polypetide chain
7547540anticodongroup of three bases on a tRNA molecule that are complimentary to an mRNA codon
7547541mutationchange in a DNA sequence that affects genetic information
7547542point mutationgene mutation involving changes in one or a few nucleotides
7547543frameshift mutationmutation that shifts the reading frame of the genetic message by inserting or deleting a nucleotide
7547544polyploidycondition in which an organism has an extra set of chromosomes
7547545operona group of genes that operate together
7547546operatorregion of chromosome in an operon to which the repressor binds when the operon is turned off
7547547differentiationprocess in which cells become specialized in structure and function
7547548hox geneseries of genes that control the differentiation of cells and tissues in an embryo

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