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Lecture 12
Important Terms
18
Biology
Undergraduate 2
10/10/2011

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Term
Peptide Bond
Definition
Bond between the Amino group end of an amino acid and the Carboxyl group end of another
Term
N Terminus
Definition
The amino group end of an amino acid
Term
C Terminus
Definition
The carboxyl group end of an amino acid
Term
Genetic Code
Definition
3 nucleotide sequence that codes an amino acid
Term
Codon
Definition
A group of three adjacent nucleotides in an mRNA molecule that specifies either one amino acid in a polypeptide chain or the termination of polypeptide synthesis
Term
Anticodon
Definition
A group of three adjacent nucleotides in a tRNA molecule that pairs with a codon in mRNA by complementary base pairing
Term
Wobble
Definition
How an one anticodon can pair with more than one codon
Term
Frameshift
Definition
Point mutation: insertion or deletion
Term
Missense
Definition
Point mutation: changes amino acid to another amino acid
Term
Nonsense
Definition
Point mutation: changes amino acid to a stop
Term
Silent mutation
Definition
Point mutation: doesn't change amino acid
Term
Amino Acyl tRNA Synthetase
Definition
Allows amino acid and uncharged tRNA to bond together temporarily
Term
EPA
Definition
Ribosome: Exit site, Peptidyl site, and Amino acyl site
Term
Ribosome
Definition
A large, complex cellular particle composed of ribosomal protein and rRNA molecules that is the site of amino acid polymerization during protein synthesis
Term
Shine Dalgarno
Definition
A sequence in prokaryotic mRNAs upstream of the start codon that base pairs with an RNA in the small ribosomal subunit, allowing the ribosome to locate the start codon for correct initiation of translation
Term
Amino Acid
Definition
Any of the small molecules, containing a carboxyl group and amino group, that are joined together to form polypeptides and proteins
Term
Polypeptide
Definition
A linear polymeric molecule consisting of amino acids joined by peptide bonds
Term
Protein
Definition
A macromolecule composed of one or more polypeptides
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