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第 2 題
According to the passage, how is the light produced in Noctiluca scintillans?
- A By converting thermal energy into light during periods of calm water.
- B Through a reaction where oxygen is catalyzed by a substrate called luciferase.
- C By an enzyme-catalyzed oxidation of luciferin, triggered by physical disturbance.
- D By absorbing nutrients from agricultural runoff and releasing them as illumination.
思路引導 VIP
文章提到，光是在名為 scintillons 的細胞器中產生的，透過螢光素（luciferin）與氧氣反應，並由螢光素酶（luciferase）催化，且這種反應是由機械壓力（如波浪擾動）觸發。選項 B 錯誤地將 luciferase 稱為底物（substrate），實際上 luciferin 才是底物。
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你能從選項中精確辨識出生物發光 (Bioluminescence) 的生化機制，說明你對科普文章的細節掌握得非常紮實，老師為你的表現感到驕傲！
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