EVERYDAY SCIENCE

Detailed explanation-1: -Bacteria that require oxygen to grow are called obligate aerobic bacteria. 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.

Detailed explanation-2: -Among organisms, almost all animals, most fungi, and several bacteria are obligate aerobes. Examples of obligately aerobic bacteria include Mycobacterium tuberculosis (acid-fast), Pseudomonas aeruginosa (Gram-negative), Bacillus (Gram-positive), and Nocardia asteroides (Gram-positive).

Detailed explanation-3: -Obligate aerobes – organisms that cannot survive without oxygen. For example, humans are obligate aerobes.

Detailed explanation-4: -Obligate aerobes require oxygen for growth and use O2 as a final electron acceptor in aerobic respiration.

Detailed explanation-5: -methane-producing archaea (methanogens), are called obligate anaerobes because their energy-generating metabolic processes are not coupled with the consumption of oxygen. In fact, the presence of oxygen actually poisons some of their key enzymes.