Practice Questions

TLS Online TPP Program

#Question id: 34533

Which of the following statements differentiate positive and negative chemotaxis?

#XL - S Microbiology

In positive chemotaxis, CheY remains phosphorylated for longer durations
In negative chemotaxis, the bacterium increases tumbling to change direction
Attractants suppress CheA activity, while repellents activate it
Only positive chemotaxis involves methylation of MCPs

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TLS Online TPP Program

#Question id: 32937

#XL - S Microbiology

A bacterial culture initially contains 1,000,000 (10⁶) CFU. After 6 minutes of heat treatment at 80°C, the bacterial count decreases to 1,000 (10³) CFU. Calculate the decimal reduction time (D-value) at 80°C.

TLS Online TPP Program

#Question id: 32938

#XL - S Microbiology

Match the following:

TLS Online TPP Program

#Question id: 32939

#XL - S Microbiology

Which of the following statements regarding microbial control is correct?

TLS Online TPP Program

#Question id: 32940

#XL - S Microbiology

Match the antimicrobial agents in group I with their category/mode of action in group II.

TLS Online TPP Program

#Question id: 32941

#XL - S Microbiology

The extracellular matrix of a biofilm primarily consists of:

TLS Online TPP Program

#Question id: 32942

#XL - S Microbiology

Which of the following factors DOES NOT contribute to biofilm formation?