Given a scientific passage and an answer, generate a question for the given answer.

[EX Q]: Passage: Regulation of transcription in prokaryotes typically involves operons. An operon is a region of DNA that consists of one or more genes that encode the proteins needed for a specific function. The operon also includes a promoter and an operator. The operator is a region of the operon where regulatory proteins bind. It is located near the promoter and helps regulate transcription of the operon genes. Answer: operon
[EX A]: Which region of dna consists of one or more genes that encode the proteins needed for a specific function?

[EX Q]: Passage: Nobody really has such colorful eyes! The colors were added digitally after the photo was taken. They represent all the different colors of light. Light is a form of energy that travels in waves. Light of different colors has different wavelengths. Answer: wavelengths
[EX A]: Different colors of light differ in terms of which important attribute?

[EX Q]: Passage: Pigments are substances that color materials by reflecting light of certain wavelengths and absorbing light of other wavelengths. The primary pigment colors are cyan, yellow, and magenta. They can be combined to produce all other colors. Answer: cyan, yellow, magenta
[EX A]:
What are the three primary pigment colors?