Texas A&M University (TAMU) BIOL206 Practice Exam 3

The correct choice highlights the significance of pH in relation to hydrogen ion concentration and its impact on bacterial survival. Bacteria thrive within specific pH ranges, and deviations can affect their cellular processes. The hydrogen ion concentration levels directly influence enzymatic activity, metabolic processes, and overall cellular function.

When the pH is too high or too low, it can lead to denaturation of proteins and disrupt cellular integrity, impacting microbial growth and reproduction. Microbes have various mechanisms to protect themselves against unfavorable pH environments, such as producing buffers or adjusting their internal pH. Therefore, understanding the relationship between pH, hydrogen ion concentration, and bacterial protection is crucial for appreciating how microbial survival is maintained in different environments.