The main reason obligate anaerobes cannot survive in the presence of oxygen is because: O Oxygen prevents anaerobic respiration O Fermentation cannot take pace in the presence of oxygen O Oxygen causes denaturation of enzymes O They lack enzymes to neutralize the toxic forms of oxygen
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- Bacteria that require an atmosphere strictly of CO2 for growth is called:Anaerobic bacteria produces which of the following inhibitory toxic product? -methilane -cyanide oxides -fatty acids -sulphidesMicroorganisms are involved in each of the following processes EXCEPT infection fog production decomposition of organic materials O food production oxygen production
- If an organism tests positive for catalase, which of the following is MOST likely true about the organism? It can only do homolactic fermentation It returns nitrogen back to the atmosphere It can break down plasma membranes It creates H2O as a product of respirationMatch each of the following terms to their proper description. You may have to use your textbook for this question. Obligate aerobe V [ Choose ] require lower than atmospheric amounts of oxygen don't require oxygen, but aren't negatively affected by it a microaerophile that requires a higher amount of CO2 than usual requires oxygen for respiration Obligate anaerobe grow with or without oxygen any amount of oxygen is lethal Facultative anaerobe [ Choose ] Aerotolerant anaerobe [ Choose ] Microaerophile [ Choose ] Capnophile [ Choose ] > > > >Bacteria that are obligate intracellular pathogens of humans are considered to be Autotrophs Heterotrophs Photosynthetic Hyperthermophiles Chemolithotrophs Which of the following statements best describes the pathogenesis of Clostridium botulinum? It elaborates an exotoxin that is a lecithinase that causes tissue necrosis. It elaborates a toxin that suppresses the release of inhibitory neurotransmitters. It produces a polysaccharide capsule that inhibits phagocytosis and contributes to invasion of the central nervous system. It elaborates a toxin that inhibits the release of acetylcholine at cholinergic synapses. It produces a leukotoxin that leads to abscess formation.
- How is it possible for strict anaerobic bacteria to cause a disease in humans? Strict anaerobe pathogens produce toxins that damage the host cells. There are parts of the human body where oxygen is absent. Strict anaerobes can hide from the immune system rather well. Strict anaerobes can break down the oxygen creating an anaerobic environment in the body.Which of the following terms is NOT used to describe microbes thrive in different temperature ranges? Thermophiles Psychrophiles O Mesophiles O HalophilesA bacterium that does not have all the enzymes of central metabolism: Can produce all the precursor metabolites it needs from malate Will not be a viable cell and will quickly die Can produce all the precursor metabolites it needs from glucose Will not grow without being supplied precursor metabolites.
- If you are working at a sewage treatment plant, which microbial process would you use to reduce nitrates in sewage before releasing into rivers? Why? O nitirification to convert nitrates to unusable nitrites; to increase algal growth in water O denitrification; to reduce HAB's O nitroge fixiation; to increase dissolved oxygen in river water nitrification; to make water richer in fertilizers when used by farmersWhich of the following groups of bacteria require or will use oxygen for respiration i. obligate aerobes ii. facultative anaerobes iii. obligate anaerobes iv. microaerophile v. aerotolerant anaerobe i & iv ii. & iv Oi&ii i, ii, iv ii & iv?Which of the following type of bacteria are pathogenic to humans Thermophiles Psychrophiles O Mesopliles O Hyperthermophiles O