Ch. 7.....5 steps to a 5

18 terms by BaileyBee

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Molecular genetics

frameshift mutation

deletion or addition of nucleotides; shifts reading frame

missense mutation

substitution of wrong nucleotide into DNA; still prodices a protein

nonsense mutation

susbstitution of wrong nucleotide into DNA that produces an early stop codon

transcription

process by which mRNA is synthesixes on a SNA template

RNA processing

introls are spliced out, exons are glued together, 3' poly-A tail, 5' G cap

translation

process by which the mRNA specified squence of aminos acids are lined up on a ribosome for protein synthesis

codon

triple of nucleotides that codes for a particular amino acid

promoter

base sequence that signals start site for transcription

repressor

protein that prevents the binding of RNA ploymerase to promoter site

inducer

molecule that binds to and inactivates a repressor

operator

shorter sequence near the promoter that assists in transcription by interacting with transcription on; when absent, it is off

operon

on/off switch for transcroption

lytic cycle

the virus is actively reproducing and kills the host cell

lysogenic cycle

the virus lies dormant within the DNA of the host cell

prion

virus that converts host brain proteins into misshapen proteins

viroids

plant viruses

phage

virus that infects bacteria

transformation

uptake of foreign DNA from the surronding environment

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