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  • Question
  • Why the bacterium Treponema pallidum is difficult to culture?


  • Options
  • A. Because it requires a great deal of water to reproduce
  • B. Because it is unable to use carbohydrates as an energy source
  • C. Because it lacks the genes needed for TCA cycle and oxidative phosphorylation
  • D. Because it requires extremely low temperature at which water freezes

  • Correct Answer
  • Because it lacks the genes needed for TCA cycle and oxidative phosphorylation 


  • Microbial Genetics problems


    Search Results


    • 1. Which of the following is used for determining the location of specific genes within the genome?

    • Options
    • A. Genomics
    • B. Annotation
    • C. Cloning
    • D. Proteomics
    • Discuss
    • 2. Hexose monophosphate pathway is also known as

    • Options
    • A. phosphogluconate pathway
    • B. oxaloacetate pathway
    • C. malate pathway
    • D. fumerate pathway
    • Discuss
    • 3. Entner-Doudoroff pathway is found in

    • Options
    • A. aerobic prokaryotes
    • B. anaerobic prokaryotes
    • C. both (a) and (b)
    • D. aerobic eukaryotes
    • Discuss
    • 4. When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called

    • Options
    • A. pentose phosphate pathway
    • B. glycolyic pathway
    • C. glyoxylate pathway
    • D. oxaloacetate pathway
    • Discuss
    • 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

    • Options
    • A. enzymes
    • B. RNA
    • C. phospholipids
    • D. all of these
    • Discuss
    • 6. The flow of genetic material in microbial cells usually takes place from

    • Options
    • A. RNA through DNA to proteins
    • B. proteins through RNA to DNA
    • C. DNA through RNA to proteins
    • D. none of these
    • Discuss
    • 7. Which of the following is the study of the molecular organization of genomes, their information content and the gene products they encode?

    • Options
    • A. Genetics
    • B. Ergonomics
    • C. Genomics
    • D. Bioinformatics
    • Discuss
    • 8. The physical nature of genomes is studied under

    • Options
    • A. structural genomics
    • B. comparative genomics
    • C. proteo genomics
    • D. functional genomics
    • Discuss
    • 9. Which of the following organisms has the smallest genome?

    • Options
    • A. H. influenzae
    • B. M. genitalium
    • C. M. tuberculosis
    • D. None of these
    • Discuss
    • 10. Which of the following is concerned with the management and analysis of biological data using computers?

    • Options
    • A. Bio-physics
    • B. Bioinformatics
    • C. Genomics
    • D. Biomechanics
    • Discuss


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