14) Dissimilatory metal reducing bacteria are useful for bioremediation of metal
ID: 213160 • Letter: 1
Question
14) Dissimilatory metal reducing bacteria are useful for bioremediation of metal and radionuclide contaminated sites because: a. Reduced states of these contaminants tend to be less soluble b. Oxidized states of these contaminants tend to be less soluble c. The bacteria assimilate contaminants into their biomass d. The bacteria do not require electron donors for dissimilatory metal reduction e. The bacteria can oxidize these contaminants to CO2 15) Which statement best describes bacterial nanowires: a. Proteinaceous filaments involved in CO2 fixation b. Polysaccharide-based appendages involved in genetic exchange Electrically conductive appendages found only in the Shewanella c. -2 d. Electrically conductive lipopolysaccharides Le. Electrically conductive proteinaceous pili-like appendages 16) For a given environment, species richness refers to: The proportion of each species present The number of available electron donors present The number of autotrophic species present in the community The total number of species present None of the above a. b. e.Explanation / Answer
Answer 14) a
metal reducing bacteria perform anaerobic respiration using metal as electron acceptor..
Normally in aerobic condition oxygen is finall electron acceptor ..which converts it into water.
In this process .. Metal reducing bacteria require electron donors and they do not form co2 ( excluding option 4 and 5)
Metal reducing bacteria act as final acceptor of electron converting it into their oxidised form..from its reduced form
There reduced form should be less soluble
Answer 15)e
bacterial nanowires are electeically condusive proteinaceous pilli like appendages involved in electron transfer in shewanella amd other species..
They are not polysaccrides.
Answer 16) d
species richness is defined as total no of species in agiven community.
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