Question

Which of this mode of trp regulation is not possible in eukaryotes?

(a) Anti-TRAP Trp-TRAP

(b) Anti-Terminator stabilization

(c) Attenuation of trp

(d) Trp-TRAP binding

The question was posed to me in class test.

I would like to ask this question from Operons : Trp topic in chapter Gene Expression : Transcription Prokaryotes of Cytogenetics

Answer 1

Correct answer is (c) Attenuation of trp

To explain: Attenuation of trp is based on ribosomal stalling at two trp codons which leads to the formation of attenuation loop. This is only possible for co-transcriptional translation which is absent in eukaryotes.