Microbial Metabolism(Microbiology ) Questions and Answers

Question 1. The chromosome of a typical bacterium is ________________
  1.    circular double-stranded DNA
  2.    circular single-stranded DNA
  3.    double-helix DNA
  4.    single stranded DNA
Explanation:-
Answer: Option A. -> circular double-stranded DNA
Answer: (a).circular double-stranded DNA
Question 2. The Lambda Bacteriophage carries out which of the following replication methods?
  1.    Theta mode
  2.    Sigma mode
  3.    Linear mode
  4.    Does not carry out replication
Explanation:-
Answer: Option B. -> Sigma mode
Answer: (b).Sigma mode
Question 3. Which of the following replication methods leads to the production of two circular daughter chromosomes?
  1.    Theta mode
  2.    Sigma mode
  3.    Linear mode
  4.    Rolling circle method
Explanation:-
Answer: Option A. -> Theta mode
Answer: (a).Theta mode
Question 4. Eukaryotes replicate their DNA from one origin or growing point per molecule.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
Explanation:-
Answer: Option B. -> False
Answer: (b).False
Question 5. If the chromosome were extended linearly then it would approximately measure?
  1.    13500 micrometre
  2.    1000 micrometre
  3.    1250 micrometre
  4.    500 micrometre
Explanation:-
Answer: Option C. -> 1250 micrometre
Answer: (c).1250 micrometre
Question 6. During the carboxylation phase of the Calvin cycle, CO2 combines with
  1.    ribulose 1,5 - bisphosphate
  2.    phosphoglyceraldehyde
  3.    pyruvic acid
  4.    oxaloacetic acid
Explanation:-
Answer: Option A. -> ribulose 1,5 - bisphosphate
Answer: (a).ribulose 1,5 - bisphosphate
Question 7. Which of the following groups contain(s) many unique coenzymes, such as coenzyme M and coenzyme F420?
  1.    Sulfate-reducing bacteria
  2.    Methanotrophs (methane-oxidizing microbes)
  3.    Methanogens (methane-producing microbes)
  4.    Acetogens (acetigens; acetate-producing microbes)
Explanation:-
Answer: Option C. -> Methanogens (methane-producing microbes)
Answer: (c).Methanogens (methane-producing microbes)
Question 8. In the passive diffusion, solute molecules cross the membrane as a result of
  1.    concentration difference
  2.    pressure difference
  3.    ionic difference
  4.    all of these
Explanation:-
Answer: Option A. -> concentration difference
Answer: (a).concentration difference
Question 9. 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
  1.    enzymes
  2.    RNA
  3.    phospholipids
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Answer: (d).all of these
Question 10. In an oxygenic photosynthesis, the green and the purple bacteria do not use which of the following one as an electron source?
  1.    H2O
  2.    H2
  3.    H2S
  4.    S (elemental sulphur)
Explanation:-
Answer: Option A. -> H2O
Answer: (a).H2O
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