Multiple choice

Iron is an extremely important transition metal in biology. It helps to perform many different biological functions, such as

  1. transport of O2 to tissues
  2. release of O2 to muscle cells
  3. cofactor to some enzymes

  1. Only 1

  2. Only 2

  3. Only 3

  4. 1 and 2

  5. 1, 2 and 3
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct answer

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