[Campbell Biology P.446] Refer to the provided diagram showing five genes with their enhance... | Practice Question

Refer to the provided diagram showing five genes with their enhancer regions. If a cell contains active green, blue, and yellow activator proteins, which gene s would most likely be transcribed?

  • A: Gene 1 only.
  • B: Gene 1 and Gene 2.
  • C: Gene 1, Gene 3, and Gene 4.
  • D: All five genes.

Explanation

By examining the diagram and the stated activators green, blue, yellow : Gene 1 has enhancer elements for yellow, green, and blue activators. Since all three are present, Gene 1 would be transcribed. Gene 2 needs purple; Gene 3 needs black and red; Gene 4 needs orange; Gene 5 needs purple and black. None of these additional activators are specified as present.