In the absence of tryptophan, the genes trpA-E will not be transcribed.
If there were a mutation in the operator region of the trp operon, there would be a nucleotide change in the sequence of the operator. Mutations in the repressor that prevent its binding to the operator will lead to constitutive expression Mutations that prevent binding of the inducer without affecting the ability to bind to the operator lead to a non‑inducible phenotype.
The tryptophan binds to the trp repressor and causes it to change shape, converting into its active form. The trp repressor with the bound tryptophan attaches to the operator, blocking RNA polymerase from binding to the promoter and preventing transcription of the operon.
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<span>Fungi decomposes organic matter in soil and secrete extracellular enzymes that digest material and absorb simple organic molecules from the environment. </span>
A centriole looks like wafer sticks glued together to make a round long shape.
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Butterfly milkweed = Asclepias Tuberosa
Dandelion = taraxacum
Black eyed Susan= Rudbeckia hirta,
Evening primrose=OenThera biennis
Spring forget me not/spring scorpion grass = Myosotis verna.
Daucus = Dacus carota
Annual ragweed = Ambrosia artemisiifolia
The answer is cyanobacteria.
