Pathogenicity islands include all of the following EXCEPT:
A) genes are not expressed as operons
B) GC/AT ratio differs from the rest of the genome
C) residual phage genomes flank the island
D) they are often linked to tRNA
E) they encode the type III protein secretion (T3SS) export systems

Question

Quizplus · Accepted Answer

Pathogenicity islands are typically characterized by a GC/AT ratio that differs from the rest of the genome, are often flanked by phage or plasmid DNA, are frequently associated with tRNA genes, and can encode specialized systems like the type III secretion system. However, the statement that genes in pathogenicity islands are not expressed as operons is incorrect; in fact, genes within these islands can be organized into operons, facilitating coordinated expression of virulence factors.

Pathogenicity Islands Include All of the Following EXCEPT