Canned crab may exhibit an unappetizing but harmless blue tint caused by _____ in the crab's blood combining with the ammonia in its flesh.
A) iron
B) copper
C) zinc
D) iodine

Question

Quizplus · Accepted Answer

Copper in the crab's blood reacts with ammonia in its flesh, leading to the blue tint. This is because the blood of some crustaceans, including crabs, contains hemocyanin, which has copper as its oxygen-binding component.

Canned Crab May Exhibit an Unappetizing but Harmless Blue Tint