Bioluminescence is caused by

Options

A. luciferin
B. electric organ
C. hormones
D. reflection from another source of light

Answer

**Step-by-Step Solution:**

1. **Understanding Bioluminescence**: Bioluminescence is the phenomenon where certain organisms emit or produce light from their bodies. This is a natural occurrence found in various species, including some types of fungi, bacteria, and marine animals.

2. **Chemical Reaction**: The light emission in bioluminescent organisms is due to a specific chemical reaction that occurs within their bodies. This reaction involves the conversion of chemical energy into light energy.

3. **Role of Enzymes**: A special enzyme called **Luciferase** plays a crucial role in this process. Luciferase catalyzes the reaction that leads to light production.

4. **Formation of Pigment**: The enzyme Luciferase acts on a pigment known as **Luciferin**. Luciferin is the molecule that, when acted upon by Luciferase, undergoes a reaction that results in the emission of light.

5. **Location of Reaction**: This biochemical reaction can occur either inside the cells of the organism or outside, depending on the type of organism and its specific bioluminescent mechanism.

6. **Conclusion**: Therefore, bioluminescence is primarily caused by the presence of the pigment **Luciferin** and the enzyme **Luciferase** that facilitates the conversion of chemical energy into light energy.

**Final Answer**: Bioluminescence is caused by the pigment Luciferin, in conjunction with the enzyme Luciferase.

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