Biology · Microbiology

The following statements describe the stress response in prokaryotes: A. PerR functions as a major peroxide sensor in many Gram-positive bacteria. B. Extreme acidic pH induces RecA-mediated DNA damage repair, which in turn may induce virulence gene expression in some pathogenic bacteria. C. Induced expression of heat shock proteins neither protects the cells from heat nor plays a role in bacterial virulence. D. In Gram-negative bacteria, alternative sigma factors like σ32 regulate the transcription of major heat shock proteins. E. GroES is an ATP-dependent chaperonin, but GroEL may function in an ATP-independent manner. Which one of the following options represents the correct combination of statements?