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Protein Synthesis - Bozemanbiology - Erin D
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23
Biology
10th Grade
04/22/2012

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Term
Protein Synthesis
Definition
The process that describes how enzymes and other proteins are made from DNA
Term
Transcription
Definition
The transfer of genetic information from DNA into an RNA molecule
Term
Translation
Definition
The synthesis of a polypeptide using the genetic information encoded in an mRNA molecule
Term
Triplet Code
Definition
The genetic instructions for the amino acid sequence of a polypeptide written in DNA and RNA as a series of three-base words (codons)
Term
Codon
Definition
A three nucleotide sequence in mRNA that specifies a particular amino acid or polypeptide termination signal; the base unit of the genetic code
Term
Genetic Code
Definition
The set of rules giving the correspondence between codons in RNA and amino acids in proteins
Term
RNA Polymerase
Definition
An enzyme that links together the growing chain of RNA nucleotides during transcription using a DNA strand as a template
Term
Promoter
Definition
A specific nucleotide sequence in DNA located at the start of a gene that is the binding site for RNA polymerase and the place where transcription begins
Term
Terminator
Definition
A sequence of nucleotides in DNA that marks the end of a gene. It signals RNA polymerase to release the newly made RNA molecule and then to depart from the gene
Term
Messenger RNA (mRNA)
Definition
The kind of RNA that encodes genetic information from DNA and conveys it to ribosomes
Term
Introns
Definition
In eukaryotes, the noncoding regions of a gene
Term
Exons
Definition
The coding regions of a gene
Term
RNA Splicing
Definition
The removal of introns and joining of exons in eukaryotic RNA, forming a mRNA molecule with a continuous coding sequence; occurs before mRNA leaves the nucleus
Term
Transfer RNA (tRNA)
Definition
A type of RNA that functions as an interpreter in translation. Each tRNA molecule has a specific anticodon, picks up a specific amino acid, and conveys the amino acid to the appropriate codon on mRNA
Term
Anticodon
Definition
On a tRNA molecule, a specific sequence of three nucleotides that is complimentary to a codon triplet on mRNA
Term
Ribosomal RNA (rRNA)
Definition
The type of RNA that, together with proteins, makes up ribosomes; the most abundant type of RNA in most cells
Term
Start Codon
Definition
The specific codon where translation begins on an mRNA molecule
Term
P site
Definition
One of two of a ribosome's binding sites for tRNA during translation. The P site holds the tRNA carrying the growing polypeptide chain
Term
A site
Definition
The binding site of tRNA bearing an amino acid
Term
Codon Recognition
Definition
The anticodon of an incoming tRNA molecule, carrying its amino acid, pairs with the mRNA codon in the A site of the ribosome
Term
Peptide Bond Formation
Definition
The polypeptide separates from the tRNA in the P site and attaches by a peptide bond to the amino acid carried by the tRNA in the A site
Term
Translocation
Definition
The tRNA in the P site leaves the ribosome, and the ribosome moves the tRNA in the A site with its attached polypeptide to the P site. The codon and anticodon remain bonded, and the mRNA and tRNA move as a unit
Term
stop codon
Definition
in mRNA, one of three triplets (UAG, UAA, UGA) that signal gene translation to stop
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