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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: 17084

#Unit 12. Applied Biology

What color does phenol red turn in acid?
TLS Online TPP Program

#Question id: 17085

#Unit 12. Applied Biology

Spontaneous cell fusion occurs at a very low rate. Enhanced fusion can be done by 
1. Sendai virus 
2. Polyethylene glycol
3. Ficol
4. Phenol red
Which of the above mentioned can be used for fusion experiments?
TLS Online TPP Program

#Question id: 19213

#Unit 12. Applied Biology

In Agrobacterium tumefaciens Crown gall formation is the consequence of
TLS Online TPP Program

#Question id: 19214

#Unit 12. Applied Biology

Depending on the Ti plasmid, the length of the T-DNA region can vary from approximately 
TLS Online TPP Program

#Question id: 19215

#Unit 12. Applied Biology

After the initial attachment step, A. tumefaciens produces a network of ________fibrils that bind the bacterium tightly to the plant cell surface. 
TLS Online TPP Program

#Question id: 19216

#Unit 12. Applied Biology

Agrobacterium respond to which plant phenolic compounds which are excreted by susceptible wounded plants.
1. Toluene
2. Acetosyringone 
3. Hydroxyacetosyringon
Which of the option have incorrect statement?