Question

Which of the following statement is incorrect with respect to operons?

Answer 1

Although prokaryotes are relatively simple organisms, their genomes are highly organised.

Prokaryotic genes are polycistronic, as multiple genes may need to be transcribed simultaneously. Operons help organise the genes this way.

Eukaryotic genes are monocistronic, and thus, typically have an individual promoter and terminator for every gene. Hence, operons are mostly a characteristic feature of prokaryotes and rarely, found in eukaryotes.

Each operon has a single promoter, downstream of which are found the operator and structural genes. Operons may either be inducible (like the lac operon of E.coli) or repressible (e.g., tryptophan or trp operon of E.coli) in nature.