Question

The color operon codes for structural genes that convert pigment A to pigment C. The operon is regulated by a gene called Paint. In wild type cells, the operon is transcribed in the presence of pigment A, but not in the absence of A. In Paint- mutants, the operon is constitutively transcribed. Is this operon inducible or repressible? Group of answer choices Inducible, because wild type transcription occurs in the presence of pigment A. Repressible, because wild type transcription is repressed in the presence of A. It cannot be determined because the number of structural genes is unknown. Inducible, because the operator in Paint- mutants can still bind to pigment A. Repressible, because Paint- transcription only occurs in the presence of pigment A.

Answer 1

Answer:

Inducible, because wild type transcription occurs in the presence of pigment A.

Explanation:

In the question, we were given that color operon codes for structural genes that convert pigment A to pigment C and is regulated by a gene called Paint. Since transcription occurs in the presence of pigment A then it means pigment A induces the transcription. This makes it Inducible, because wild type transcription occurs in the presence of pigment A.