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16. The susceptibility of a microorganism to antibiotics and other chemotherapeutic agents can be determined by using

A. tube dilution technique
B. paper disk plate
C. both (a) and (b)
D. none of these

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17. Most antibiotics are isolated from

A. viruses
B. aquatic microorganisms
C. soil microorganisms
D. plants

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18. Which of the following group is not the carbohydrate-containing antibiotics?

A. Streptomycin & Streptothricin
B. Vancomycin & Moenomycin
C. Everninomycin & Nogirimycin
D. Erythromycin & candicidin

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19. The penicillin stable in gastric acid and suitable for oral administration is

A. methicillin
B. carbenicillin
C. cloxacillin
D. penicillin-G

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20. Which of the following is not an example of potent antitumor agents?

A. Anthramycin
B. Sibromycin
C. Neothramycin
D. Erythromycin

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