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TLS Online TPP Program

#Question id: 2651

In the presence of lactose, how long does it take for the lac operon to be expressed?

#XL - T Zoology

  1. when lactose equals glucose concentration

  2. when glucose is more than lactose concentration

  3. as long as lactose is more than glucose concentration

  4. as long as lactose is more than galactose concentration

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TLS Online TPP Program

#Question id: 34204

#XL - S Microbiology

A bacterium has a πœ‡max​  of 1.2 h⁻¹ and exhibits a specific growth rate (πœ‡) of 0.8 h⁻¹ when the substrate concentration 𝑆 is 0.4 g/L. Calculate the value of 𝐾𝑠​ .
TLS Online TPP Program

#Question id: 34205

#XL - S Microbiology

A continuous culture is maintained under steady-state conditions in a chemostat where the dilution rate equals the specific growth rate. If the maximum specific growth rate (ΞΌmax) of the organism is 0.8 h-1 and the substrate concentration at which the organism grows at this rate is 1.6 g/L, determine the substrate concentration (in g/L) at which the specific growth rate becomes 0.4 h-1. Assume Monod kinetics apply and Ks=0.4 g/L.
TLS Online TPP Program

#Question id: 34206

#XL - S Microbiology

In a chemostat experiment, a microbial species with πœ‡max=1.0 hβˆ’1  and 𝐾𝑠=0.2 g/L is maintained at steady-state. If the dilution rate is set to 0.5 h-1, calculate the substrate concentration (S) in the reactor (in g/L), assuming Monod growth.
TLS Online TPP Program

#Question id: 34325

#XL - S Microbiology

Which of the following statements regarding moist heat sterilization are correct?
TLS Online TPP Program

#Question id: 34326

#XL - S Microbiology

Which of the following chemical agents act by disrupting microbial membranes?
TLS Online TPP Program

#Question id: 34327

#XL - S Microbiology

Which of the following can be used as indicators for successful sterilization?