Lecture 18 Flashcards
1
Q
What are the 2 categories of point mutations?
A
- nucleotide-pair substitution
2. one or more nucleotide-pair insertions or deletions
2
Q
What are the three mutations?
A
- silent mutations
- missense mutations
- nonsense mutation
3
Q
Breakage of a chromosome leads to 4 types of changes in the chromosome strucuture
A
- deletion
- duplication
- inversion
- translocation
4
Q
Cell can regulate production of enzymes by…
A
feedback inhibition or gene regulation
5
Q
gene expression in bacteria controlled by…
A
operon
6
Q
what are the 2 level of controls?
A
- enzyme activity
- enzyme expression
7
Q
entire stretch of DNA that includes operator, promoter and genes that they control
A
operon
8
Q
prevents gene transcription by binding to operator and blocking RNA polymerase
A
repressor
9
Q
molecule that cooperates with repressor protein to switch operon off
A
corepressor
