Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as a co-repressor and inhibits its own synthesis through:

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#Question id: 1401

#SCPH06 I Botany

Which of the following are proto-oncogenes?

a. fos               b. myc             c. p53              d. ras               e. Rb

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#Question id: 5239

#SCPH05 I Biotechnology

Which of the following statements is not true for Hfr strains of E. coli ?

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#Question id: 1121

#SCPH01 Biochemistry

Which of the following provides the best evidence that cell-signaling pathways evolved early in the history of life?

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#Question id: 11200

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

Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experimentally depolarize the middle of the axon to threshold, using an electronic probe, then ________.

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#Question id: 294

#SCPH01 Biochemistry

Which of the following pairs of amino acids would you predict to only participate in Van der Waals interactions in the three dimensional folding of a protein: