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TLS Online TPP Program

#Question id: 4322

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

#SCPH01 Biochemistry

  1. the amino acid inactivates the repressor.

  2. the repressor is active in the absence of the amino acid.

  3. the amino acid acts as a corepressor.

  4. the amino acid turns on transcription of the operon.

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TLS Online TPP Program

#Question id: 10946

#SCPH28 | Zoology

A 26-year-old man received a paper cut. What substance is the major cause of pain of this acute inflammatory response?
TLS Online TPP Program

#Question id: 15918

#SCPH05 I Biotechnology

The following are methods of sterilization EXCEPT: 
TLS Online TPP Program

#Question id: 4563

#SCPH05 I Biotechnology

If ʺxʺ indicates the location of fossils of two closely related species, then fossils of their most-recent common ancestor are most likely to occur in which stratum?
TLS Online TPP Program

#Question id: 2326

#SCPH28 | Zoology

The movement of chromosomes during mitosis is due to the:
TLS Online TPP Program

#Question id: 4569

#SCPH06 I Botany

Which of the following must exist in a population before natural selection can act upon that population?