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Gene Expression - Protein Synthesis
proteins and genes
11
Biology
9th Grade
06/16/2015

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Term
DNA
Definition

double strand, deoxyribose, H bonds, permanent copy, transcription, A,G,C,T

Term
RNA
Definition
single strand, ribose, no Hydrogen bonds, temporary copy, translation, A,C,G,U
Term
mRNA (messanger)
Definition
carries instructions for polypeptide synthesis
Term
rRNA
Definition
forms ribosomal subunits
Term
tRNA
Definition
carries amino acids to ribosomes and matches anticodons to mRNA codons
Term
Transcription
Definition
DNA gene is a template for complementary RNA molecules. RNA polymerase separates DNA strands and allows RNA nucleotides to match up base pairs (in nucleus)
Term
Translation
Definition

decoding of mRNA message into protein. mRNA goes through ribosome, tRNA comes with to match codons with anticodons and amino acids to create a polypeptide chain. 

Term
Insertion
Definition
one extra base is inserted into DNA sequence
Term
Deletion
Definition
one base is deleted from DNA sequence
Term
Substitution
Definition
one base replaced with another base. affects only one amino acid
Term
Most lethal mutations
Definition
insertion and deletion - considered a "frameshift" mutation because they shift the entire sequence, causing a drastic change
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