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Home Microbiology Bacteria Morphology See What Others Are Saying!
  • Question
  • Chemotaxis is a phenomenon of


  • Options
  • A. swimming away of bacteria
  • B. swimming towards a bacteria
  • C. swimming away or towards of bacteria in presence of chemical compound
  • D. none of the above

  • Correct Answer
  • swimming away or towards of bacteria in presence of chemical compound 


  • More questions

    • 1. Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the

    • Options
    • A. microbial loop
    • B. Winogradsky column
    • C. Redfield ratio
    • D. Gibbs free energy
    • Discuss
    • 2. Agar is used for solidifying culture media because

    • Options
    • A. it does not affect by the growth of bacteria
    • B. it does not add to the nutritive properties of the medium
    • C. the melting and solidifying points of agar solution are not the same
    • D. all of the above
    • Discuss
    • 3. Which of the following is correct?

    • Options
    • A. All members of Hyphomycetes are also members of Fungi, but not all members of Fungi are members of Hyphomycetes
    • B. All members of Fungi are also members of Hyphomycetes, but not all members of Hyphomycetes are members of Fungi
    • C. All members of Hyphomycetes are members of Fungi, and all members of Fungi are members of Hyphomycetes
    • D. No member of Hyphomycetes is a member of Fungi
    • Discuss
    • 4. Enzymes can

    • Options
    • A. not pass through semipermeable membrane
    • B. pass through semipermeable membrane
    • C. dissolve semipermeable membrane
    • D. none of these
    • Discuss
    • 5. Intracellular enzymes

    • Options
    • A. synthesize cellular material only
    • B. synthesize cellular material and perform catabolic reaction
    • C. synthesize cellular material and perform anabolic reaction
    • D. only provide energy to the cell
    • Discuss
    • 6. In the exponential phase, the cells and cell mass

    • Options
    • A. first increases then decreases
    • B. decreases
    • C. are constant
    • D. double at a constant rate
    • Discuss
    • 7. Which of the following can be used to detect clumping factor?

    • Options
    • A. tube coagulase test
    • B. slide coagulase test
    • C. precipitation test
    • D. none of these
    • Discuss
    • 8. A spore differs from an actively replicating bacterium in that the spore

    • Options
    • A. is produced during a process involving asymmetric division
    • B. is able to withstand more extreme conditions than the replicating cell
    • C. is metabolically inactive
    • D. all of the above
    • Discuss
    • 9. Which of the following organisms typically get their carbon for biosynthesis from organic compounds?

    • Options
    • A. Aerobic, glucose-respiring bacteria (aerobic respiration)
    • B. Ammonia-oxidizing bacteria (chemolithotrophic bacteria)
    • C. Photosynthetic cyanobacteria (phototrophic metabolism)
    • D. None of the above
    • Discuss
    • 10. The fragmentation occurs in

    • Options
    • A. Streptomyces species
    • B. Nocardia species
    • C. Bacillus subtilis
    • D. None of these
    • Discuss


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