pre-transcriptional regulation Flashcards
pre-transcriptional regulation
controls the amount of mRNA and the synthesis of enzymes/proteins from them
repression
inhibits gene expression
response to over abundance of the end product of metabolic pathway
mediated by regulatory proteins called repressors
inductions
turns on transcription of a gene
mediated by regulatory proteins called inducers
mutations
change in genetic material
2 types of mutations
point shift mutations
frameshift mutations
point shift mutations
base pair substitution
different types of point shift mutations
silent, missense, and nonsense
silent point shift mutation
mutation doesn’t affect protein at all
missense point shift mutation
any genetic mutation that changes amino acid from one to another
nonsense point shift mutation
any genetic mutation that leads to the RNA sequence becoming a stop codon
frameshift mutation
insertion or deletion of one or more nucleotide pairs