Carotenoid

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/carotenoid

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the chemical structure?C40 tetraterpenoid skeleton with conjugated polyene chain
2. What is the biosynthetic origin?Primarily plants, algae, and photosynthetic bacteria; ancient metabolic pathway
3. What are carotenoids?Carotenoids are natural pigments that give fruits, veggies, flowers, and some animals bright yellow, orange, and red colors. They are made from a 40‑carbon chain with many double bonds that absorb light. They are found inside cell membranes and fat droplets.
4. Why do carrots look orange?Carrots contain a carotenoid called beta‑carotene. Its long chain of double bonds makes it absorb blue and green light, leaving orange visible to us. Beta‑carotene also helps protect cells from damage.

Chromophore: The part of a molecule responsible for its color by absorbing specific wavelengths of light.
Reactive Oxygen Species (ROS): Unstable molecules containing oxygen that can damage cells and DNA.
Xanthophyll Cycle: A biochemical process in plants that dissipates excess light energy as heat.
Bioavailability: The degree and rate at which a substance is absorbed into the body.