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Home Microbiology Bacteria Morphology See What Others Are Saying!
  • Question
  • Cyanobacteria have


  • Options
  • A. a gram-positive cell wall
  • B. a gram-negative cell wall
  • C. Neither (a) nor (b)
  • D. No cell wall

  • Correct Answer
  • a gram-negative cell wall 


  • More questions

    • 1. Ropiness in bread is caused by

    • Options
    • A. Bacillus subtilis
    • B. A. niger
    • C. R. nigricans
    • D. P. expansum
    • Discuss
    • 2. Swimming towards a chemical of bacteria is termed as

    • Options
    • A. positive chemotaxis
    • B. negative chemotaxis
    • C. phototaxis
    • D. magnetotaxis
    • Discuss
    • 3. The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to

    • Options
    • A. radiation
    • B. desiccation
    • C. both (a) and (b)
    • D. extreme temperatures
    • Discuss
    • 4. The __________ of the influenza-enveloped virus appear to be involved in attachment to the host cell receptor site.

    • Options
    • A. fimbriae
    • B. flagellae
    • C. hemagluttinin
    • D. neuraminidase
    • Discuss
    • 5. What information can be generated by interrupted mating experiments?

    • Options
    • A. Levels of DNA homology
    • B. Bacterial genome maps
    • C. DNA nucleotide sequences
    • D. Proteomics of the bacteria
    • Discuss
    • 6. Which of the following is not correct for hepatitis A virus?

    • Options
    • A. It can be grown in cell cultures of primate and human cells
    • B. It is one of the most stable viruses infecting humans
    • C. It may cause hepatocellular carcinoma
    • D. None of the above
    • Discuss
    • 7. The time in minutes at a specific temperature needed to kill a population of cells is the

    • Options
    • A. decimal reduction time
    • B. thermal death point
    • C. thermal death temperature
    • D. F value
    • Discuss
    • 8. Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

    • Options
    • A. ingestion of bacteria
    • B. ingestion of mold
    • C. ingestion of fungi
    • D. all of these
    • Discuss
    • 9. Starch is an energy storage material characteristic of

    • Options
    • A. chlorophyta
    • B. chrysophyta
    • C. phaeophyta
    • D. rhodophyta
    • Discuss
    • 10. The evolutionary record suggests that the first occurrence of multicellularity was in the kingdom

    • Options
    • A. Monera
    • B. Protista
    • C. Fungi
    • D. Plantae
    • Discuss


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