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What happens when the cell is not in the presence of tryptophan?
Wiki User
∙ 10y ago
RNA polymerase can transcribe mRNA
Wiki User
∙ 10y ago
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How is the trp repressor protein and allosteric protein?
If Tryptophan is low in the diet, the repressor changes shape and allows the RNA polymerase to attach and copy the DNA so that Tryptophan can be produced by the cell.
What chemical grouping is responsible for a positive Hopkins-Cole test?
Tryptophan
The expression of the tryptophan operon is controlled by?
a repressor that is active when it binds to tryptophan
Cell membranes are characterized by the presence of?
Cell membranes are characterized by the presence of phospholipids.
The presence of cell walls in plant cells makes them?
it gives the plant cell a protection wall
Why is the tryptophan operon turned off in the presence of tryptophan?
Tryptophan binds to and activates the repressor proteins; the repressor proteins, in turn, bind to the operator, preventing transcription.
What would happen if the amount of tryptophan being produced in an E.coli cell when the repressor is attached to the operator?
No amount of tryptophan would be produced
What is the Hopkins-Cole test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
What is Hopkins's test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
What is the Hopkins Cole test?
The hopkins-cole test is used to determine the presence of the amino acid tryptophan. Tryptophan has an indole nucleus which is responsible for the violet ring found at the junction between the two layers.
Is fungi the presence or absence of a cell?
fungi is the presence of a cell
How is the trp repressor protein and allosteric protein?
If Tryptophan is low in the diet, the repressor changes shape and allows the RNA polymerase to attach and copy the DNA so that Tryptophan can be produced by the cell.
What is the chemical formula for tryptophan?
The chemical formula for tryptophan is C11H12N2O2
What chemical grouping is responsible for a positive Hopkins-Cole test?
Tryptophan
Who noted the presence of sarcode in cells?
who noted the presence of sarcode in cell
What would distiguish a bacterial cell from an animal cell?
presence of a cell wall
Which cell shows the presence of a nucleus?
B) Eukaryotic cell
