Question

hb unit 2.1 cell energy and photosynthesis quiz 2025 (connected module8)
extra credit
in the video, uv light is shined on two test - tubes. identify which test tube contains chlorophyll and which contains green food coloring. explain your reasoning based on what you observed and your understanding of the role of chlorophyll in photosynthesis.

Explanation:

Chlorophyll fluoresces under UV - light due to its ability to absorb and re - emit light energy during photosynthesis. Green food coloring does not have this property. If one test tube shows fluorescence under UV light, it contains chlorophyll. If there is no fluorescence, it contains green food coloring.

Answer:

The test tube that fluoresces under UV light contains chlorophyll, and the one that does not fluoresce contains green food coloring. This is because chlorophyll has the unique property of fluorescence related to its role in capturing and re - emitting light energy in photosynthesis, while green food coloring does not have such a photosynthetic - related light - emitting property.