Question

Tryptophan (Trp) operon is
(a) inducible system
(b) repressible system
(c) controlled by regulator genes
(d) controlled by three structural genes

Answer 1

Answer:

The trp operon is an operon—a group of genes that is used, or transcribed, together—that codes for the components for production of tryptophan. ... In the trp operon, tryptophan binds to the repressor protein effectively blocking gene transcription.

Answer 2

Answer:

d) is the correct answer