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The sun gives off light, heat, and can be used for plants and such
As a result the bacterial cells switch off transcription of genes involved in the production of tryptophan because the amino acid binds to the REPRESSOR.
I think I’ve answers this altered but it’s time
Answer:
I think the answer is C because it makes most sense to me, A doesn't really seem like a reasonable answer, B and D also show that basically scientists work for their whole life just for money but not to help humanity and things like that.