Answer:
An amino acid activates the repressor so that the repressor binds to the operator and prevents transcription.
Explanation:
In an operon, promoter is followed by operator which is finally followed by the structural genes to be transcribed. RNA Polymerase binds to the promoter and initiates transcription. A repressor can negatively control the transcription process by binding to the operator so that the RNA Polymerase is not able to move forward and transcription is halted.
For example: in trp operon, tryptophan amino acid binds to the repressor molecule which leads to change in repressor's shape. The repressor is now able to bind to the operator and prevent transcription.
Of the Protists,The fungi,,the plants and animals
Answer:
Tentacles have specialised stinging cells called nematocysts. They use these to immobilise their prey so that the tentacles are then able to move the food into the mouth.
Explanation:
Answer:
The Correct Option of the Given Scenario is "Binds Divalent Metal Cations That Constrain the PCR Reaction"
Explanation:
The part that Chelex show in the segregation of genomic DNA is normally that the Chelex Formulate the PCR. The sightless Restraints like 
Get involved to the DNA there by mortifying and make it unbalanced for PCR
