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Chapter 13 vocab
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21
Biology
9th Grade
05/11/2011

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Term
biotechnology
Definition
The use of organism to perform practical task for humman
Term
recombinant DNA technology
Definition
technology that combines genes from diffrent sources into a single DNA molecule
Term
plasmid
Definition
small, circular DNA molecule found in bacteria that is separate from the bacterial chromosome
Term
restriction enzyme
Definition
enzyme that cuts sugar-phosphate bonds in the DNA backbone at specific points within particular nucleotide sequences in DNA.
Term
genomic library
Definition
complete collection of cloned DNA fragments from an organism
Term
nucleic acid probe
Definition
radioactively labeled nucleic acid molecule used to tag a particular DNA sequence
Term
Genetic modified organism (GMO)
Definition
organism that has acquired genetic material by artificial means
Term
transgenic
Definition
genetically modified organism whose source of new genetic material is a different specie
Term
polymerse chain reaction (PCR)
Definition
technique that makes many copies of a certain segment of DNA without using living cells
Term
gel electroporesis
Definition
technique for sorting molecules or fragments of molecules by length
Term
genetic marker
Definition
specific portion of DNA that varies among individuals
Term
DNA fingerprint
Definition
an individual's unique banding pattern on an electrophoresis gel, determined by restriction fragments of the person's DNA
Term
operon
Definition
control sequence on an operon that acts as a switch, determining whether or not RNA polymerase can attach to the promoter
Term
promoter
Definition
control sequence on an operon where RNA polymerase attaches to the DNA
Term
operator
Definition
control sequence on an operon that acts as a switch, determining whether or not RNA polymerase can attach to the promoter
Term
repressor
Definition
protein that binds to the operator and blocks attachment of RNA polymerase to the promoter
Term
transcription factor
Definition
protein that regulates transcription by binding to promoters or to RNA polymerases
Term
gene expression
Definition
transcription and translation of genes into protein
Term
cellular diffrentiation
Definition
increasing specialization in structure and function of cells during development of a multicellular organism
Term
stem cell
Definition
cell with the potential to develop into one of several types of differentiated cells
Term
homeotic gene
Definition
master control gene in many organisms that directs development of body parts
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