Answer:
C. repressible
Explanation:
The trp operon in bacteria is a repressible operon. The regulatory gene codes for repressor protein. In the presence of tryptophan, the repressor (inactive) binds with tryptophan and gets activated. This active repressor attaches with operator and prevent polymerase to bind and thus inhibiting transcription of genes in the operon.
The mutant strain cannot attach to operator (trpO+) but it can make dimers. As the operator is mutated so it prevent binding of repressor to operator. Thus, expression of the trp operon is repressible.
Answer:
Cell division helps maintain homeostasis in living things because it creates new cells that can be used for growth and repair.
Explanation:
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The recessive genes are the genes that stay hidden away for some animals and show up later. Example, If the deer's parents had perfectly fine fur, than that means that its grandparents or great grandparents could of had the white fur disorder.
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