The trp operon is ____ unless tryptophan is ____.
A) turned on; available in the environment
B) turned on; bound to the operator
C) turned off; bound to the repressor
D) turned off; bound to the promoter
E) turned on; synthesized by the trp repressor gene
Correct Answer:
Verified
Q1: If the lacI repressor gene were permanently
Q2: Where is the trp repressor gene located?
A)
Q4: Genes under positive control are _.
A) off
Q5: Regulatory proteins bind to the _ of
Q6: What is the relationship between operons and
Q7: The genes in an operon are _.
A)
Q8: In prokaryotes, high levels of cAMP _.
A)
Q9: In prokaryotes, the genes for metabolic pathways
Q10: The E. coli lac operon encodes three
Q11: How is lac operon transcription regulated by
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