NURSING ANM AND GNM

Detailed explanation-1: -Obligate anaerobes, which live only in the absence of oxygen, do not possess the defenses that make aerobic life possible and therefore cannot survive in air.

Detailed explanation-2: -Obligate anaerobes cannot tolerate oxygen because they utilize metabolic schemes built around enzymes that react with oxidants. The reliance upon low-potential flavoproteins for anaerobic respiration probably causes substantial superoxide and hydrogen peroxide to be produced when anaerobes are exposed to air.

Detailed explanation-3: -Anaerobic bacteria are germs that can survive and grow where there is no oxygen. For example, it can thrive in human tissue that is injured and does not have oxygen-rich blood flowing to it. Infections like tetanus and gangrene are caused by anaerobic bacteria.

Detailed explanation-4: -Reduction of oxygen produces superoxide ions which cause intercellular damage and produce reactive oxygen species which cause intercellular damage. Therefore, presence of oxygen can destroy anaerobic bacteria.