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TLS Online TPP Program

#Question id: 3983

Transcription of the lactose operon in E. coli is stimulated by:

#Unit 3. Fundamental Processes

  1. a mutation in the repressor gene that strengthens the affinity of the repressor for the operator.

  2. a mutation in the repressor gene that weakens the affinity of the repressor for the operator.

  3. a mutation in the repressor gene that weakens the affinity of the repressor for the inducer.

  4. binding of the repressor to the operator.

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TLS Online TPP Program

#Question id: 2154

#Unit 2. Cellular Organization

Membrane lipids are distributed appropriately between the two leaflets of a given membrane by

a. dockases.    

b. trumpases.              

c. fatty acid desaturases.        

d. flippases.    

e. transmembrane tunnelases.
TLS Online TPP Program

#Question id: 1645

#Unit 4. Cell Communication and Cell Signaling

What is the characteristic that best defines the acquired immune response?
TLS Online TPP Program

#Question id: 12210

#Unit 7. System Physiology – Animal

Which of the following stimulates the secretion of parathyroid hormone (PTH)?
TLS Online TPP Program

#Question id: 28957

#Unit 7. System Physiology – Animal

which of the following is correctly showing Wolff –Chaikoff effect ?
TLS Online TPP Program

#Question id: 3940

#Unit 3. Fundamental Processes

You have examined nucleoli structures from several sources listed below and find that the cell type with the largest nucleolus is the: