A microorganism has a D-value of 5 minutes at 121°C. How much time (in minutes) is required to achieve a 6-log reduction at this temperature?

( Time = D × log reduction)

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#Question id: 3039

#XL - S Microbiology

An inoculated thioglycolate medium culture tube shows dense growth at the surface and turbidity throughout the rest of the tube. What is your conclusion?

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#Question id: 3041

#XL - S Microbiology

Which statement about gram-negative bacteria is correct?

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#Question id: 3042

#XL - S Microbiology

Mycotoxins are formed during the end of

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#Question id: 3044

#XL - S Microbiology

If the pH indicator were left out of MacConkey agar, the medium would be

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#Question id: 3045

#XL - S Microbiology

Which one of the following combinations Mac-Conkey Agar allows to growth of gram negative bacteria?

(P) Bile salts                          (Q) Sodium chloride

(R) Methylene blue                  (S) Crystal violet

TLS Online TPP Program

#Question id: 3046

#XL - S Microbiology

Which one of the following reagent used in differentiation of gram positive and Gram negative bacteria?

(P) Congo red                        (Q) Safranine

(R) Methylene blue                  (S) Iodine