Luciferin is a molecule that, when broken down in fireflies, produces heat and light. the rate a which luciferin is broken down in cells is controlled by: 1. a carbohydrate 2. a simple sugar 3. an enzyme 4. a complex fat me asap! i need the answer now i don't understand this! this is regions science!

Enzymes

Explanation:

Enzymes are the biocatalyst that serves to speed up the rate of chemical reactions by lowering down the required activation energy. They are proteins and are not used up during the reactions. Breakdown of luciferin is also regulated by the enzyme. Carbohydrates and fats serve as energy source mainly. Simple sugar is also a carbohydrate and serves as an energy source.

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during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.