16. | Disease-producing species occurring in a mixed culture can be selected by taking advantage of _________ |
a. | its pathogenic properties |
b. | special carbon source |
c. | special nitrogen source |
d. | toxic chemicals |
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Answer: (a).its pathogenic properties
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17. | Treponema sp. can be selected by taking advantage of ____________ |
a. | small cell size |
b. | motility |
c. | dilute media |
d. | small cell diameter and bacterial motility |
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Answer: (d).small cell diameter and bacterial motility
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18. | A large cluster of colonies are obtained in streak plate method. |
a. | True |
b. | False |
c. | May be |
d. | Can't say |
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Answer: Use of dilute media
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19. | Roll-tube technique is used to isolate ___________ |
a. | aerobes |
b. | anaerobes |
c. | facultatives |
d. | stringent anaerobes |
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Answer: (d).stringent anaerobes
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20. | In pour-plate method,the medium should be maintained at what temperature? |
a. | 37 degree C |
b. | 67 degree C |
c. | 45 degree C |
d. | 0 degree C |
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Answer: (c).45 degree C
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