Practice question
Question
Auxin biosynthesis primarily uses which amino acid?
Explanation
Tryptophan (C) is correct here. This is core Auxin Phytohormone: once you know the definition or pathway step, Tryptophan is the clear fit. The wrong ones are A) Tyrosine; B) Phenylalanine; D) Methionine. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.
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