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

Input: Consider Input: Passage: Each kind of pigment absorbs specific wavelengths (colors) of light (dashed lines). Sunlight contains many different wavelengths, which you see when they separate into a rainbow. Not all colors of light are used in photosynthesis (solid line). Most plants, algae, and photosynthetic bacteria appear green because they reflect green wavelengths. Their pigments have absorbed the violet-blue and red wavelengths. The amount of photosynthesis depends on the wavelength of light available. Beta-carotene is another type of pigment that absorbs sunlight. Answer: rainbow

Output: Sunlight contains many different wavelengths, which you see when they separate into what?

Input: Consider Input: 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

Output: Which region of dna consists of one or more genes that encode the proteins needed for a specific function?

Input: Consider Input: Passage: Electric charge is found only in a conductor. Answer: conductor
Output: Where is the only place an electric charge can be found?