Chapter 1 pretest
Only a small percentage of microbes__________.
Which of the following are true of scientific names assigned to living organisms?
The scientific name is always underlinded or italicized.
In the scientific name, Escherichia coli, Escherichia is the ________.
An organism is found in a deep-sea vent where the temperature is very high and the mineral content very unusual. The organism is unicellular, has no apparent nucleus, and has a cell wall but no peptidoglycan. This organism would be classified as which of the following types of organisms?
All of the following describe a major feature used to classify organisms into to three domains (Bacteria, Archaea & Eukarya) EXCEPT _________.
presence or absence of DNA
Hooke & Van Leeuwenhoek helped to create the basis of the cell theory by __________.
observing & documenting cells using microscopes to visualize structure of living things.
Which of the following were instrumental in DISPROVING spontaneous generation?
Pasteur's experiments using a specialzed swan-necked flask that prevented microbes from entering flasks open to the air.
Aseptic techinque is a standard lab practice that includes all of the following EXCEPT _______.
elimination of all oxygen during any processes to prevent conatamination
Koch's postulates are the essential foundation for which of the following?
The steps that relate a specific microbe to specific disease (etiology).
For which of the following can Koch's postulates be used to identify the etiologic agent as the cause of the disease?
Streptoccoccus pyogenes, the organism that causes step throat, which can be culutred on blood agar.
Jenner's work with vaccination depended on which of the following?
Trusting that the body produced invisible agents that effectively overcame an invisible microbe.
Which of the following is true about antibiotics?
Previously treatable microbes have become resistant to some antibiotics.
Pasteur discovered that microbes can cause food spoilage. His solution to protect wine from spoiling was a process called pasteurization, which is based on what principle?
Heating beer & wine just enough to kill those organisms causing the spoilage.
Which of the following statements about normal microbiota found on the human body is FALSE?
Normal micobiota commonly overcome our defenses & produce disease.
Which of the following is true of biofilms?
A biofilm is complex aggregation of microbes.
All of the following factors contribute to the threat of emerging infectious diseases (EIDs) EXCEPT ______.
vaccinations against various types of childhood diseases.
Which one of the following is an example of bioremediation?
use of Pseudomoanas to remove uranium from soil at weapons depots
Which of the following processes are beneficial activities of microorganisms?
a. recycling elements in the environment
b. decomposing sewage
c. producing foods & chemicals
d. all of these.
All of these
Which of the following best describes gene therapy?
Use of harmless virus to insert a gene in a host cell
Which of the following is correctly matched?
Fleming and antimicrobials