Question:
Ethylene is derived from which of the following amino acids?
Ethylene is derived from which of the following amino acids?
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Ethylene biosynthesis:
Methionine \(\rightarrow\) SAM \(\rightarrow\) ACC \(\rightarrow\) Ethylene.
ACC synthase and ACC oxidase are key enzymes.
Ethylene is a gaseous hormone.
Methionine \(\rightarrow\) SAM \(\rightarrow\) ACC \(\rightarrow\) Ethylene.
ACC synthase and ACC oxidase are key enzymes.
Ethylene is a gaseous hormone.
Updated On: Sep 1, 2026
- Mevalonic acid
- Methionine
- Serine
- Glutamic acid
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of plant hormone biosynthesis.
Step 2: Detailed Explanation:
Ethylene is derived from the amino acid methionine (B).
The biosynthetic pathway involves:
- Methionine \(\rightarrow\) S-adenosylmethionine (SAM) (via SAM synthetase).
- SAM \(\rightarrow\) 1-aminocyclopropane-1-carboxylic acid (ACC) (via ACC synthase).
- ACC \(\rightarrow\) Ethylene (via ACC oxidase).
Mevalonic acid (A): Precursor for terpenoids and cytokinins.
Serine (C): Precursor for glycine and cysteine.
Glutamic acid (D): Precursor for proline and arginine.
Thus, ethylene is derived from methionine.
Step 3: Final Answer:
Thus, ethylene is derived from methionine, which corresponds to option (B).
[0.5cm]
This question tests knowledge of plant hormone biosynthesis.
Step 2: Detailed Explanation:
Ethylene is derived from the amino acid methionine (B).
The biosynthetic pathway involves:
- Methionine \(\rightarrow\) S-adenosylmethionine (SAM) (via SAM synthetase).
- SAM \(\rightarrow\) 1-aminocyclopropane-1-carboxylic acid (ACC) (via ACC synthase).
- ACC \(\rightarrow\) Ethylene (via ACC oxidase).
Mevalonic acid (A): Precursor for terpenoids and cytokinins.
Serine (C): Precursor for glycine and cysteine.
Glutamic acid (D): Precursor for proline and arginine.
Thus, ethylene is derived from methionine.
Step 3: Final Answer:
Thus, ethylene is derived from methionine, which corresponds to option (B).
[0.5cm]
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