Copper-based oxygen-transport pigment in some invertebrates is which?

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Prepare for the Comprehensive Entomology Exam with detailed quizzes on Morphology, Behavior, Evolution, and Pest Management. Dive into multiple-choice questions with solutions and explanations to boost your understanding. Get ready to ace your entomology test!

Multiple Choice

Copper-based oxygen-transport pigment in some invertebrates is which?

Explanation:
Copper-based oxygen-transport pigment in some invertebrates is hemocyanin. This protein carries oxygen in the animal’s hemolymph using copper ions at its active sites to bind O2, and when oxygenated it has a characteristic blue color. This contrasts with iron-based systems used in vertebrates, where hemoglobin (and the related myoglobin for storage in muscle) rely on iron in a heme group to bind oxygen. Hemerythrin, another invertebrate oxygen carrier, uses iron but not within a heme and has a different color, often violet-pink. So the copper-containing pigment used by many invertebrates to transport oxygen is hemocyanin.

Copper-based oxygen-transport pigment in some invertebrates is hemocyanin. This protein carries oxygen in the animal’s hemolymph using copper ions at its active sites to bind O2, and when oxygenated it has a characteristic blue color. This contrasts with iron-based systems used in vertebrates, where hemoglobin (and the related myoglobin for storage in muscle) rely on iron in a heme group to bind oxygen. Hemerythrin, another invertebrate oxygen carrier, uses iron but not within a heme and has a different color, often violet-pink. So the copper-containing pigment used by many invertebrates to transport oxygen is hemocyanin.

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