By Mutating Selected Bases in Sequence 3 in the Leader

question 7

Multiple Choice

By mutating selected bases in sequence 3 in the leader peptide of the trp operon of E.coli,attenuation compared to the normal sequence is:

• A)unchanged.
• B)only increased in the presence of Trp.
• C)always increased.
• D)decreased.
• E)Cannot be determined from the information given.

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