Considering the E

question 4

Multiple Choice

Considering the E.coli trp operon,which of the following is TRUE?
(I) The formation of the 2-3 hairpin is highly favored over the 1-2 hairpin when trp is low.
(II) When the concentration of Trp-tRNA^Trp is low,the ribosome halts on tandem Trp codon of segment 1.
(III) Formation of the 2-3 hairpin facilitates transcription and translation of the trp operon.
IV) The attenuator system has no effect when Trp levels are high.

• A)I,II,III,IV
• B)I,II,III
• C)II,III
• D)II,III,IV
• E)II,IV

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Local Self-Government

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