Introduction

Which of the following statements concerning Koch's postulates is false?

       The suspected pathogen may not be present in all cases of the disease being studied.

Which of the following was NOT an aspect of Pasteur's experiments to disprove spontaneous generation?

      The flasks he used were sealed with corks.

Microorganisms characterized by the absence of a nucleus are called

      prokaryotes

Whose search for chemicals that would kill microbes without harming humans was the foundation for chemotherapy?

       Ehrlich

The microbes commonly known as ________ are single-celled eukaryotes that are generally motile.

      protozoa

Which of the following question largely stimulated the research of microbes during what is known as the Golden Age of Microbiology?

What causes disease, and is spontaneous generation of microbes possible?

Antoni van Leeuwenhoek was the first person in history to

        view microorganisms and record these observations.

What is the correct order for the application of Koch's postulates?
I. Inoculate suspect agent into test subject and observe that subject develops disease of interest.
II. Isolate and culture suspect agent in the laboratory.
III. Find suspect agent is every case of disease of interest but not in healthy hosts.
IV. Recover and isolate suspect agent from test subject.

           III, II, I, IV

Which of the following is NOT a characteristic of viruses?

        They are visible with a light microscope.

Identification of bacteria in the laboratory usually begins with the ________ for placement in one of two large groups of bacteria.

        Gram stain

Which of the following individuals pioneered the use of chemicals to reduce the incidence of infections during surgery?

     Lister

Which of the following statements about fungi is FALSE?

      Fungi are photosynthetic.