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Considering the E. coli trp operon, which of the following is TRUE? I. The formation of...

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-tRNATrp 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. II and III

b. I, II and III

c. III and IV

d. II, III and IV

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Answer #1

Answer : option b (i, ii , and iii option is correct).

As option I is correct

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