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33 questions
Extremophiles which can survive under highly acidic environment are called as ___________
Barophiles
Acidophiles
Alkalophiles
Thermophilea
Which of the following is a correct source where acidophiles are located
Freshwater
Saltwater lakes
Acid mine drainage
Acid rain
Extremophilic acidophiles are found at pH __
pH 2.2
pH 7
pH 6.5
pH 9
Acidophilic bacteria involved in making acetic acid ____
Thiooxidans ferroxidans
Acidophilus thiooxidans
Acetobacter aceti
Thermopasmatales
Acidophile involved in bioleaching of metal is
Acetobacter aceti
Lactobacillus acidophillus
Leuconostoc spp.
Thiobacillus ferroxidans
Which of the following mechanism is used by acidophilies to maintain inner pH?
Apoptosis
Cytolysis
Proton efflux
Phagocytosis
Acidophiles belong to which group of following
Archeae
Eubacteria
Both archeae and eubacteria
None of the above
Acidophile can synthesis pH resisting enzyme like _____
Pepsin
Lipase
Kinase
Trypsin
Impermeability of cell membrane of an acidophile is due to presence of
Tetra ether lipids
Muramic acid
Phospholipids
Sphingo lipids
You can find extremophiles in
Laboratory
Hydrosphere
Volcanic springs
Freshwater
Active mechanism used by acidophiles to survive highly acidic environment
Proton efflux pump
DNA repair system
Chemotaxis
Quoram sensing
Which of the following has acidic cytoplasm
Acetobacter aceti
E.coli
Rhizophus
Bacillus thurengenesis
Acidophile found in volcanic springs having optimum growth pH 2 to 3 is
Sulfolobus spp.
Acetobacter aceti
Bacillus spp
E.coli
Reduced pore size of membrane as an adaptation in _____________ can be seen which helps to survive in acidic conditions
Thermoplasmas
Acidthiobacillus ferooxidans
Bacillus spp
Acetobacter aceti
Genome of ________ is smaller than neutrophiles
Barophiles
Psycrophiles
Acidophiles
Thermophiles
Which of the following is an extremozyme produced by acidophiles
Lipase
Sulfate oxygenase
Protease
Amylase
Enzyme providing adaptability to extremophiles is called
Isozyme
Robozyme
Abyzyme
Extremozyme
Obligate acidophiles require pH in range of
pH 1-4
pH 4-6
pH 6-10
pH 3-6
Which protein in acidophiles helps in acid stability
Rusticyanin
Phycocyanin
Pepsin
None of the following
Which is the best place to find acidophiles
Drainage
Arctic ocean
Salt lake
Hydrothermal vents
Despite environment being acidic acidophiles manages to keep their internal pH near to neutral because of
DNA repair system
Chemotaxis
Impermeability of cell wall
Phagocytosis
________ has pH below 3
Arctic sea
Acid mining drainage
Sewage
Salt lake
California mine has massive growth of an acidophile called as
Thermus acquaticus
Ferroplasma
Spirulina
Leuconostoc
Thiobacillus ferroxidans is involved in bioleaching of
Copper
Steel
Charcoal
Sulphur
Which of the following is an example of extremophiles
Acidophiles
Barophiles
Thermophiles
All of the above
Which of the following acidophile is responsible for mineralization process?
Acidthiobacillus caldus
Acetobacter aceti
Alicyclobacillus acidoterrestris
Sulfolobus spp
Food spoiling acidophile
Alicyclobacillus acidoterrestris
Acidthiobacillus caldus
Thiobacillus ferroxidans
Thermoplasm acidophilum
Acidthiobacillus ferooxidans cell membrane consists ___________ fatty acids
Cyclopropane
Beta hydroxy
Omega cyclohexyl
None of the above
Acidophiles generates an inside positive transmembrane electric potential to resist the inward flow of protons like
Na+
K+
Cl-
None of these above
Ubiquitous phenomenon that establishes cell to cell communication in bacterial population through production, secretion and detection of signal molecules is called as
Chemotaxis
Quorum Sensing
Phagocytosis
Biofilm
Flagella mediated movement of bacterial cells in response to environmental stimulus like pH, temperature,osmotic pressure is called as ______
Quorum sensing
Chemotaxis
Phagocytosis
None of the above
fur gene is significantly upregulated in some genes related chemotaxis in which acidophile ?
Acidthiobacillus caldus
Ferroplasma spp
Acetobacter aceti
Thiobacillus ferroxidans
Glycosyl hydrolases (an extremozyme) used in antibiotic production is obtained from ___________
Hydrogenomonas
Acidthiobacillus caldus
Acidthiobacillus ferooxidans
Sulfolobus spp