Which chemical or substance is an example of a secondary metabolite?
A) Tannin produced by oak trees to protect them against herbivores
B) The enzyme phosphofructokinase used in glycolysis
C) Hemoglobin used to carry oxygen in the blood
D) Pyrogen produced by the body to induce a fever
E) Testosterone produced in males

Question

Quizplus · Accepted Answer

Tannin is an example of a secondary metabolite because it is produced by oak trees for a specific purpose other than essential growth and development. Secondary metabolites are organic compounds that are not directly involved in an organism's normal growth, development, or reproduction, but instead, are synthesized for purposes such as defense against predators or attraction of pollinators.

Which Chemical or Substance Is an Example of a Secondary