SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An organism that can survive without oxygen
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An organism that MUST have oxygen to survive.
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When two bacteria attach to each other and combine DNA (NOT reproduction).
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The breaking down of dead organisms and organic waste.
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Detailed explanation-1: -The word anaerobic indicates “without oxygen.” The term has many uses in medicine. 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.
Detailed explanation-2: -Anaerobes are microorganisms that don’t require oxygen in order to survive or proliferate. Instead of oxygen, anaerobic organisms use electron acceptors such as nitrate or sulfate and other inorganic acceptors that have a lower reduction potential than oxygen, thus resulting in less efficient respiration.
Detailed explanation-3: -Oxygen Toxicity 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. The excited singlet oxygen molecule is very reactive. Therefore, superoxide must be removed for the cells to survive in the presence of oxygen.
Detailed explanation-4: -Anaerobic respiration is a type of respiration where oxygen is not used; instead, organic or inorganic molecules are used as final electron acceptors. Fermentation includes processes that use an organic molecule to regenerate NAD+ from NADH.
Detailed explanation-5: -Obligate anaerobes like Peptostreptococcus, Treponema, Fusiform, Porphyromonas, Veillonella and Actinomyces can live without oxygen.