Question

add commas, semicolons, or colons if needed. otherwise, submit the text without any additional punctuation. zinc is a trace element found in the pancreas, where it may help store insulin in the gastrointestinal tract, where its a part of enzymes that digest protein and in red blood cells.

Explanation:

The sentence lists three places where zinc is found. Commas are used to separate items in a list. The first comma after "insulin" is incorrect as it is not part of a list of independent clauses. A semicolon is used to separate items in a list when the items themselves contain commas. Here, each part (in the pancreas..., in the gastrointestinal tract..., and in red blood cells) is a separate location. The first blank should be a semicolon and the second blank should be a comma.

Answer:

Zinc is a trace element found in the pancreas, where it may help store insulin; in the gastrointestinal tract, where it's a part of enzymes that digest protein, and in red blood cells.