SOS response

Question 1

when is SOS response activated

Answer 1

if DNA is heavily damaged by mutagenic agents

Question 2

SOS response involves what

Answer 2

Recombination, repair and replication

Question 3

what polymerase replicates DNA in damaged regions

Answer 3

V but cannot be replicated accurately

Question 4

SOS response does what overall

Answer 4

eliminates gaps but increases the frequency of replication errors

Question 5

In the absence of DNA damage, what happens (lexA)

Answer 5

LexA binds to DNA regions that regulate transcription of SOS response genes and keeps their expression levels low

Question 6

When their is DNA damage, what happens (RecA)

Answer 6

RecA binds to single stranded regions of damaged DNA

Question 7

RecA does what in terms of LecA

Answer 7

stimulates LexA to inactivate itself as LexA controls SOS expression