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Microbial Metabolism

Microbial Metabolism
In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?

H2S
H2O
S (elemental sulphur)
H2

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Microbial Metabolism
Bacteriochlorophyll differs from chlorophyll in what way?

They have different absorption spectra
Both (b) and (c)
The chelated metal in bacteriochlorophyll is not Mg
There are chemical differences between the two chlorophyll in their side (R) groups

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Microbial Metabolism
Which of the following is responsible for phosphate solubilization?

Streptococcus
Bacillus
Clostridium
Streptomyces

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Microbial Metabolism
Phosphate deregulated mutants are

less sensitive to phosphate regulation
none of these
highly sensitive to phosphate regulation
moderately sensitive to phosphate regulation

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Microbial Metabolism
Anoxygenic photosynthetic bacteria oxidize

water
sulfide
ammonia
oxgyen

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Microbial Metabolism
As the electron flow through the chains, much of their free energy is conserved in the form of ATP. This process is called

electromotive potential
dehydrogenations
oxidative phosphorylation
none of these

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