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- Question
Which of the following is used for the proper maintenance and preservation of pure cultures?
Options- A. Periodic transfer to fresh media
- B. Preservation by overlaying cultures with mineral oil
- C. Preservation by lyophilization
- D. All of the above
- Correct Answer
- All of the above
- 1. Cell counting can be carried out by
Options- A. direct microscopic count using petroffhansser counting chamber
- B. plate counting
- C. membrane filter count
- D. all of the above Discuss
- 2. The medium which allows the growth of more than one microorganisms of interest but with morphologically distinguishable colonies is known as
Options- A. selective medium
- B. enrichment medium
- C. differential medium
- D. none of these Discuss
- 3. 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
- 4. Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited.
Options- A. bile salts
- B. low concentration of various dyes
- C. sugars
- D. low levels of nitrogen Discuss
- 5. Important example(s) of enriched medium/media is/ are
Options- A. Loeffler's serum slope
- B. Bordet-gengou medium
- C. Blood agar
- D. All of these Discuss
- 6. Which of the following bacteria can grow in acidic pH?
Options- A. Vibrio cholerae
- B. Lactobacilli
- C. Shigella
- D. Salmonella Discuss
- 7. Which of the following bacteria can grow in alkaline pH?
Options- A. Shigella
- B. Lactobacilli
- C. Salmonella
- D. Vibrio cholerae Discuss
- 8. Which of the following hint(s) suggest/s that a given specimen is likely to contain anaerobic bacteria?
Options- A. Gas in specimen
- B. Foul odour
- C. Presence of sulphur granules
- D. All of these Discuss
- 9. A disease producing species occurring in a mixed culture can often be selected on the basis of its
Options- A. pathogenic properties
- B. special carbon source
- C. special nitrogen source
- D. none of these Discuss
- 10. When a substance is added to a liquid medium which inhibits the growth of unwanted bacteria and favors the growth of wanted bacteria, it is known as
Options- A. differential medium
- B. enriched medium
- C. enrichment medium
- D. selective medium Discuss
Cell Cultures and Characteristics problems
Search Results
Correct Answer: all of the above
Correct Answer: differential medium
Correct Answer: all of the above
Correct Answer: bile salts
Correct Answer: All of these
Correct Answer: Lactobacilli
Correct Answer: Vibrio cholerae
Correct Answer: All of these
Correct Answer: pathogenic properties
Correct Answer: enrichment medium
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