Haemocyanin

High school (ages 12+)
Human Body

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/haemocyanin

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 protein class?Copper-containing respiratory metalloprotein
2. What is the active site composition?Two copper atoms coordinated by histidine residues
3. What is haemocyanin and why is it blue?It is a copper‑based protein that carries oxygen in some sea creatures, and when it grabs oxygen it turns blue.
4. How does haemocyanin help sea animals breathe?It picks up oxygen from the water or air and carries it through the animal’s body, just like blood does in humans.

Metalloprotein: A protein that contains one or more metal ions essential for its function.
Allosteric Effectors: Molecules that bind to a protein at a site other than the active site, altering its activity.
Bohr Effect: The reduction in the affinity of a respiratory protein for its ligand (like oxygen) due to a change in pH.