The answer probably lies in the fact that repression of the trp operon is weak—much weaker.

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#Id: 9242

#Unit 6. System Physiology – Plant

The decarboxylation of OAA catalyzed by PEPCK yields CO2, using ATP provided by mitochondrial respiration.

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#Id: 2473

#Unit 13. Methods in Biology

In ZE a homogeneous buffer system is used over the whole separation time and range so as to ensure a constant pH value.

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#Id: 6717

#Unit 8. Inheritance Biology

Replica plating method - Isolation of auxotroph

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#Id: 2526

#Unit 13. Methods in Biology

The PCR involves two oligonucleotide primers, 17–30 nucleotides in length, which flank the DNA sequence that is to be amplified.

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#Id: 5031

#Unit 3. Fundamental Processes

The gene ftsZ plays a central role in division.

Mutations in ftsZ block septum formation and generate filaments.

Overexpression induces minicells by causing an increased number of septation events per unit cell mass.

FtsZ (the protein) recruits a battery of cell division proteins that are responsible for synthesis of the new septum.