Glyphosate, the active molecule in the herbicide Roundup, is an inhibitor of the enzyme 5-enolpuruvylshikimate-3-phosphate synthase in the chorismate synthesis pathway. Which of the following amino acids would not be produced in a plant treated with Roundup?

Question

Quizplus · Accepted Answer

Glyphosate inhibits the synthesis of chorismate, which is a precursor to many aromatic amino acids, including phenylalanine, tyrosine, and tryptophan. Therefore, a plant treated with Roundup will not be able to produce tyrosine. Glycine, serine, valine, and proline are not derived from chorismate and will still be produced in the plant.

Glyphosate, the Active Molecule in the Herbicide Roundup, Is an Inhibitor