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TLS Online TPP Program

#Question id: 34533

Which of the following statements differentiate positive and negative chemotaxis?

#XL - S Microbiology
  1. In positive chemotaxis, CheY remains phosphorylated for longer durations
  2. In negative chemotaxis, the bacterium increases tumbling to change direction
  3. Attractants suppress CheA activity, while repellents activate it
  4. Only positive chemotaxis involves methylation of MCPs
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TLS Online TPP Program

#Question id: 14971

#XL - S Microbiology

Bacillus and Clostridium are medically relevant groups of bacteria that characteristically stain 
TLS Online TPP Program

#Question id: 14972

#XL - S Microbiology

Although O side chains are readily recognized by host antibodies, gram negative bacteria may thwart host defenses by 
TLS Online TPP Program

#Question id: 14977

#XL - S Microbiology

Careful electron microscopic studies often have shown the nucleoids are present in contact. Thus bacterial DNA is attached to
TLS Online TPP Program

#Question id: 14979

#XL - S Microbiology

Which is not true of mitochondria and chloroplasts?
TLS Online TPP Program

#Question id: 14980

#XL - S Microbiology

The membranes of eukaryotes and mycoplasma
TLS Online TPP Program

#Question id: 14981

#XL - S Microbiology

The endoplasmic reticulum has many important functions. It transports proteins, lipids, and probably other materials through the cell. The ER is also a major site of