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IAA precursor is...

IAA precursor is

A

Tryptophan

B

Leucine

C

Tyrosine

D

Phenylalanine.

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding IAA**: IAA stands for indole-3-acetic acid, which is a naturally occurring auxin, a type of plant hormone that plays a crucial role in plant growth and development. 2. **Identifying Precursors**: A precursor is a substance from which another substance is formed. In the context of IAA, we need to identify which amino acid serves as its precursor. 3. **Reviewing Amino Acids**: The options provided are: - Tryptophan - Leucine - Tyrosine - Phenylalanine 4. **Linking IAA to Its Precursor**: Research indicates that plants synthesize IAA primarily from the amino acid tryptophan. This means that tryptophan is the precursor for the production of IAA. 5. **Conclusion**: Based on the information gathered, the correct answer to the question "IAA precursor is" is **tryptophan**.
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