TLS Online TPP Program

#Question id: 4337


Which of the following conditions is most likely to cause the lactose operon to be transcribed?

#SCPH28 | Zoology
  1. There is more glucose in the cell than lactose.

  2. There is glucose but no lactose in the cell.

  3. The cyclic AMP and lactose levels are both high within the cell.

  4. The cAMP level is high and the lactose level is low.

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TLS Online TPP Program

#Question id: 2636

#SCPH01 Biochemistry

Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site

TLS Online TPP Program

#Question id: 2636

#I Life Science/ Life Sciences Group – I-V

Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site

TLS Online TPP Program

#Question id: 2636

#SCPH05 I Biotechnology

Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site

TLS Online TPP Program

#Question id: 2636

#SCPH28 | Zoology

Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site

TLS Online TPP Program

#Question id: 2637

#SCPH01 Biochemistry

Which of these operons is anabolic?

TLS Online TPP Program

#Question id: 2637

#I Life Science/ Life Sciences Group – I-V

Which of these operons is anabolic?