EVERYDAY SCIENCE

Detailed explanation-1: -An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. Normal microbial culturing occurs in an aerobic environment which poses a problem when culturing anaerobes; requiring one of a number of techniques to be used to keep oxygen out of the culturing setup.

Detailed explanation-2: -In most cases, these bacteria require oxygen to grow because their methods of energy production and respiration depend on the transfer of electrons to oxygen, which is the final electron acceptor in the electron transport reaction. Obligate aerobes include Bacillus subtilis, Pseudomonas…

Detailed explanation-3: -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-4: -Examples of obligately anaerobic bacterial genera include Actinomyces, Bacteroides, Clostridium, Fusobacterium, Peptostreptococcus, Porphyromonas, Prevotella, Propionibacterium, and Veillonella.

Detailed explanation-5: -Facultative anaerobes show better growth in the presence of oxygen but will also grow without it. Although aerotolerant anaerobes do not perform aerobic respiration, they can grow in the presence of oxygen. Most aerotolerant anaerobes test negative for the enzyme catalase.