NEET BIOLOGY

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: -They cannot grow without oxygen. Obligate anaerobes cannot grow in the presence of oxygen. They depend on fermentation and anaerobic respiration using a final electron acceptor other than oxygen. Facultative anaerobes show better growth in the presence of oxygen but will also grow without it.

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

Detailed explanation-4: -Examples of obligate anaerobes are Bacteroides and Clostridium species.

Detailed explanation-5: -Aerotolerant organisms can survive in the presence of oxygen, but they are anaerobic because they do not use oxygen as a terminal electron acceptor.