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TLS Online TPP Program

#Question id: 2677

Why is the transcription of structural genes of the trp operon turned off in the presence of tryptophan?

#SCPH06 I Botany

  1. Tryptophan is the repressor that binds to the operator, preventing transcription.

  2. The structural genes are used to make tryptophan, which would not be needed if tryptophan is available.

  3. Tryptophan has no effect on the transcription of the structural genes.

  4. Tryptophan RNA polymerase from finding the promoter of the trp operon, preventing structural gene transcription.

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TLS Online TPP Program

#Question id: 5037

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

Genes control development by:
TLS Online TPP Program

#Question id: 2067

#SCPH01 Biochemistry

Which of the following would likely diffuse through the lipid bilayer of a plasma membrane most rapidly?
TLS Online TPP Program

#Question id: 10509

#SCPH05 I Biotechnology

A different type of mechanical obstacle to herbivory is provided by mineral crystals that are present in many plant species, such as silica crystals known as
TLS Online TPP Program

#Question id: 5246

#SCPH05 I Biotechnology

The end result of F factor mediated conjugation:
TLS Online TPP Program

#Question id: 19466

#SCPH01 Biochemistry

Hematoxylin is a basic dye which which basically bind to which amino acids?