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WorksheetsMicrobial activities and their applications - MicroCore RC
Total questions: 8
Worksheet time: 4mins
This principle/process states that living organisms interact with their inorganic surroundings on Earth to form a synergistic and self-regulating, complex system that helps to maintain and perpetuate the conditions for life on the planet.
Biodegradation
Biogeochemical cycling
Bioremediation
Gaia hypothesis
Which of the following elements is cycled most intensely?
Fe
Mg
Ca
Cr
S
Which of the folowing is a nitrite oxidizer?
Nitrosomonas
Nocardia
Azospirillum
Nitrobacter
Pseudomonas
Which of the following is true about oxidative sulfur transformations and sulfur oxidizers?
Conversion of sulfite, thiosulfate, or elemental sulfur to hydrogen sulfide
Conversion of inorganic sulfur compounds by sulfur oxidizers such as Desulfuromonas
Gain energy for cell synthesis and growth by coupling the oxidation of organic compounds or molecular hydrogen (H2) to the reduction of sulfate (SO4 2−) to sulfide (H2S, HS−)
Elemental sulfur converted to sulfuric acid
Which of the following is not an iron oxidizer?
Acidithiobacillus ferroxidans
Sphaerotilus natans
Gallionella ferruginea
Geobacter metallireducens
Which principle states that no natural organic compound is resistant to biodegradation provided that environmental conditions are favorable?
Microbial Biodegradation
Microbial Infallibility
Microbial Bioconversion
Microbial Xenobiosis
What makes xenobiotic substances resistant to biodegradation?
Excessively low molecular size
Unusual bonds or bond sequences
Unusual substitutions
Lack of suitable permeases
Excessive toxicity of parent compounds
Which of the following processes can result to the biodegradation of xenobiotic compounds?
Oxidative methylation
Natural restoration
Anaerobic dechlorination
Reductive dechlorination
