A scientist constructs a recombinant bacterial plasmid that contains a gene conferring resistance to the antibiotic ampicillin (amp). The scientist transforms cultures of E. coli bacteria with the recombinant plasmid, then incubates the cultures overnight on plates containing media without ampicillin (amp-) and with ampicillin (amp+).

Assuming the transformation protocol was successful, which of the following best predicts the bacterial growth pattern expected after the incubation period?

 

TLS Online TPP Program

#Question id: 21139

#Unit 12. Applied Biology

Strain improvement for the large scale antibiotics production by using methods__

I) Gene transformation

II) Mutation and selection

III) Auxotophs mutants

TLS Online TPP Program

#Question id: 21140

#Unit 12. Applied Biology

In nutrition limitation condition, the bacterial growth curve reaches onto the Idiophase. In this phase which mechanism is responsible for enhancing the secondary metabolite production?

TLS Online TPP Program

#Question id: 21141

#Unit 12. Applied Biology

A vector contains the nitR gene under the control of the nitA promoter in a separate operon, the expression of vector is used, upon the addition of the inducer. The inducer–NitR protein complex activates the transcription of both the target gene(s) and nitR and increased level of NitR results in a very high level of production of the target protein(s). Which type of inducer using by nitR?

TLS Online TPP Program

#Question id: 21142

#Unit 12. Applied Biology

Some given Polyketide drugs except__

TLS Online TPP Program

#Question id: 21143

#Unit 12. Applied Biology

Polyketides are a class of natural products derived from___

TLS Online TPP Program

#Question id: 21144

#Unit 12. Applied Biology

Xanthan Gum is produce from Xanthomonas campestris is a___

a) Gram-negative

b) Gram-positive

c) Obligatory aerobic soil bacterium

d) Facultative anaerobic bacteria