TLS Online TPP Program

#Question id: 40461


In the E. coli chemotaxis pathway, which of the following events directly leads to "tumbling" behavior?

#Applied Microbiology
  1.  Dephosphorylation of CheY by CheZ 
  2.  Binding of phosphorylated CheY (CheY-P) to the FliM switch protein
  3. Methylation of MCPs by CheR
  4. Binding of an attractant to the periplasmic domain of MCPs
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TLS Online TPP Program

#Question id: 37869

#Plant Biotechnology

Which of the following parameters primarily determines the duration of the lag phase?
Statement I: The size of the inoculum. 
Statement II: The growth phase of the culture from which the inoculum was taken.

Choose the correct combination:

TLS Online TPP Program

#Question id: 37870

#Plant Biotechnology

Given below are two statements:
Statement I: The replacement volume in an open continuous culture is adjusted to keep the culture at submaximal growth indefinitely.
Statement II: Continuous culture systems maintain a steady state by replacing a portion of spent medium with fresh medium.

In the light of the above statements, choose the most appropriate answer from the options given below:

TLS Online TPP Program

#Question id: 37871

#Plant Biotechnology

Given below are two statements:
Statement I: Open continuous cultures involve the removal of equal volumes of cells and used medium which is replaced by fresh medium.
Statement II: In closed continuous cultures, the cell population remains static (constant) because cells are constantly removed.

In the light of the above statements, choose the most appropriate answer from the options given below:

TLS Online TPP Program

#Question id: 37872

#Plant Biotechnology

Given below are two statements:
Statement I: In a closed continuous culture, cells are separated from the removed medium and returned to the vessel, causing the cell biomass to increase.
Statement II: In an open continuous culture, only the used medium is removed while the cells are retained to maintain submaximal growth.

In the light of the above statements, choose the most appropriate answer from the options given below:

TLS Online TPP Program

#Question id: 37873

#Plant Biotechnology

Open culture systems in plant and microbial cell culture are typically of which types?

TLS Online TPP Program

#Question id: 37874

#Plant Biotechnology

In a turbidostat, the culture is maintained at: