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Microbiology - Microbial Metabolism

@ : Home > Microbiology > Microbial Metabolism > Section 1

Exercise

  • Section 1
"No one is as deaf as the man who will not listen."
- (Proverb)
1. 

During the carboxylation phase of the Calvin cycle, CO2 combines with
A. ribulose 1,5 - bisphosphate
B. phosphoglyceraldehyde
C. pyruvic acid
D. oxaloacetic acid
2. 

Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?
A. Sulfate-reducing bacteria
B. Methanotrophs (methane-oxidizing microbes)
C. Methanogens (methane-producing microbes)
D. Acetogens (acetigens; acetate-producing microbes)
3. 

In the passive diffusion, solute molecules cross the membrane as a result of
A. concentration difference
B. pressure difference
C. ionic difference
D. all of these
4. 

In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?
A. H2O
B. H2
C. H2S
D. S (elemental sulphur)
5. 

Radioisotopes are frequently used in the study of cells. Assume a culture of E. coli is grown in a culture medium containing radioactive phosphorous. At the end of 48 hours, it is expected to find the radioactive label located in
A. enzymes
B. RNA
C. phospholipids
D. all of these

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