Which molecule is used for firefly bioluminescence?

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Study for the Science Olympiad Entomology Exam. Dive into entomology with flashcards and multiple-choice questions. Each question comes with hints and explanations to help you ace your exam!

Multiple Choice

Which molecule is used for firefly bioluminescence?

Explanation:
Luciferin. In fireflies, light comes from the oxidation of luciferin catalyzed by the enzyme luciferase, with ATP and oxygen providing the energy. The chemical reaction releases photons, giving the glow. The other substances—melanin, chlorophyll, and hemoglobin—serve pigmentation, photosynthesis, or oxygen transport, not light generation, so they aren’t the molecules responsible for the bioluminescence.

Luciferin. In fireflies, light comes from the oxidation of luciferin catalyzed by the enzyme luciferase, with ATP and oxygen providing the energy. The chemical reaction releases photons, giving the glow. The other substances—melanin, chlorophyll, and hemoglobin—serve pigmentation, photosynthesis, or oxygen transport, not light generation, so they aren’t the molecules responsible for the bioluminescence.

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