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  • The plant hormone Indole-3-acetic acid (IA) is present in most plants. The structure of this hormone is related to which one of the following amino acids?<div class='

The plant hormone Indole-3-acetic acid (IA) is present in most plants. The structure of this hormone is related to which one of the following amino acids?

Option: 1

Glutamic acid


Option: 2

Aspartic acid 


Option: 3

Lysine


Option: 4

Tryptophan


Answers (1)

best_answer

The structure of the plant hormone indole-3-acetic acid (IA) is related to the amino acid tryptophan.

Indole-3-acetic acid (IAA) is a naturally occurring auxin, which is a class of plant hormones involved in regulating various aspects of plant growth and development. The chemical structure of IAA is derived from the amino acid tryptophan. In the biosynthesis pathway of IAA, tryptophan serves as a precursor.

During the synthesis of IAA, tryptophan undergoes several enzymatic conversions, including decarboxylation and hydroxylation, resulting in the formation of indole-3-acetic acid. Thus, the structure of IAA is closely related to the structure of tryptophan, from which it is derived.

It's important to note that IAA is not the only auxin present in plants, but it is one of the most common and well-studied auxins. Other related auxins, such as indole-3-butyric acid (IBA), also share structural similarities to tryptophan. Hence, the correct answer is option 4.

Posted by

Ritika Jonwal

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