Practice Questions

TLS Online TPP Program

#Question id: 2927

Site-directed mutagenesis of Tyr-15 to Phe in cdc2:

#XL - T Zoology

results in the wee mutant phenotype.
results in a phenotype similar to that caused by mutation in cdc25.
increases the possible number of phosphate groups on Cdc2.
prevents binding of Cdc13.

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TLS Online TPP Program

#Question id: 34333

#XL - S Microbiology

Which of the following factors affect the efficacy of chemical disinfectants?

TLS Online TPP Program

#Question id: 34334

#XL - S Microbiology

Which of the following can pass through a standard 0.22 µm membrane filter?

TLS Online TPP Program

#Question id: 34335

#XL - S Microbiology

Which of the following are used to validate sterilization procedures?

TLS Online TPP Program

#Question id: 34336

#XL - S Microbiology

Ethylene oxide gas sterilizes by which of the following mechanisms?

TLS Online TPP Program

#Question id: 34337

#XL - S Microbiology

Which of the following mechanisms are responsible for the sterilizing effect of ionizing radiation (e.g., gamma rays)?

TLS Online TPP Program

#Question id: 34338

#XL - S Microbiology

Which of the following represent the mode of action of alcohol-based disinfectants?