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Module 14 Terms (Chapter 21)
Terms
35
Biology
Undergraduate 1
04/07/2010

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Term
Anticodon
Definition
Three-base sequence in a tRNA molecule base that pairs with a complementary codon in mRNA.
Term
Bioinformatics
Definition
Computer technologies used to study the genome.
Term
Biotechnology Product
Definition
Prpduct created by using biotechnology techniques.
Term
Cloning
Definition
Production of identical copies; can be either the production of identical individuals or, in genetic engineering, the production of identical copies of genes.
Term
Codon
Definition
Three-base sequence in mRNA that causes the insertion of a particular amine acid into a protein or termination of translation.
Term
Complementary Paired Bases
Definition
Hydrogen bonding between particular bases; in DNA thymine (T) pairs with adenine (A), and guanine (G) pairs with cytosine (C); in RNA, uracil (U) pairs with A, and G pairs with C.
Term
Complementary DNA (cDNA)
Definition
DNA that has been synthesized from mRNA by the action of reverse transcriptase.
Term
DNA (Deoxyribonucleic Acid)
Definition
Nucleic acid polymer produced from covalent bonding of nucleotide monomers that contain the sugar deoxyribose; the genetic material of nearly all organisms.
Term
DNA Ligase
Definition
Enzyme that links DNA fragments; used during production of rDNA (recombinant DNA) to join foreign DNA to vector DNA.
Term
DNA Replication
Definition
Synthesis of a new DNA double helix prior to mitosis and meiosis in eukaryotic cells, and during prokaryotic fission in prokaryotic cells.
Term
Double Helix
Definition
Double Spiral; describes the three-dimensional shape of DNA.
Term
Gene Cloning
Definition
Production of one or more copies of the same gene.
Term
Genetic Engineering
Definition
Alteration of DNA for medical or industrial purposes.
Term
Genomics
Definition
Study of all the nucleotide sequences, including structural genes, regulatory sequences, and noncoding DNA segments, in the chromosomes of an organism.
Term
Messenger RNA (mRNA)
Definition
Type of RNA formed from a DNA template that bears coded information for the amino acid sequence of a polypeptide.
Term
Mutation
Definition
Alteration in chromosome structure or number and also an alteration in a gene due to a change in DNA composition.
Term
Plasmid
Definition
Self-replicating ring of accesory DNA in the cytoplasm of bacteria.
Term
Polymerase Chain Reaction (PCR)
Definition
Technique that uses the enzyme DNA polymerase to produce millions of copies of a particular piece of DNA.
Term
Polyribosome
Definition
String of ribosomes simultaneously translating regions of the same mRNA strand during protein synthesis.
Term
Proteomics
Definition
The study of all proteins in an organism.
Term
Recombinant DNA (rDNA)
Definition
DNA that contains genes from more than one source.
Term
Restriction Enzyme
Definition
Bacterial enzyme that stops viral reproduction by cleaving viral DNA; used to cut DNA at specific points during the production of recombinant DNA.
Term
Ribosomal RNA (rRNA)
Definition
Type of RNA found in ribosomes where protein synthesis occurs.
Term
RNA (Ribonucleic Acid)
Definition
Nucleic acid produced from covalent bonding of nucleotide monomers that contain the sugar ribose; occurs in three forms: messenger RNA (mRNA), ribosomal RNA (rRNA), and transfer RNA (tRNA).
Term
RNA Polymerase
Definition
During transcription, an enzyme that joins nucleotides complementary to a DNA template.
Term
Template
Definition
Pattern or guide used to make copies; parental strand of DNA serves as a guide for the production of daughter DNA strands, and DNA also serves as a guide for the production of messenger RNA (mRNA).
Term
Transcription
Definition
Process whereby a DNA strand serves as a template for the formation of mRNA.
Term
Transcription Factor
Definition
In eukaryotes, protein required for the intiation of transcription by RNA polymerase.
Term
Transfer RNA (tRNA)
Definition
Type of RNA that transfers a particular amino acid to a ribosome during protein synthesis; at one end, it binds to the amino acid, and at the other end it has an anticodon that binds to an mRNA codon.
Term
Transgenic Organism
Definition
Free-living organism in the environment that has a foreign gene in its cells.
Term
Translation
Definition
Process whereby ribosomes use the sequence of codons in mRNA is produce a polypeptide with a particular sequence of amino acids.
Term
Triplet Code
Definition
Each sequence of three nucleotide bases in the DNA of genes stands for a particular amino acid.
Term
Uracil (U)
Definition
The base in RNA that replaces thymine found in DNA; pairs with adenine.
Term
Vector
Definition
In genetic engineering, a means to transfer foreign genetic material into a cell (e.g., a plasmid).
Term
Xenotransplantation
Definition
Use of animal organs, instead of human organs, in human transplant patients.
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