Question:
_ _ _ _ element is a component of Ferredoxin:
_ _ _ _ element is a component of Ferredoxin:
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Ferredoxin is an iron-sulphur protein involved in electron transport. Remember: chlorophyll contains magnesium, plastocyanin contains copper and ferredoxin contains iron.
Updated On: Jun 19, 2026
- Zinc
- Iron
- Magnesium
- Copper
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The Correct Option is B
Solution and Explanation
Step 1: Understand the role of Ferredoxin.
Ferredoxin is an important iron-containing protein found in plants, algae and some bacteria.
It acts as an electron carrier in several biological processes.
In plants, ferredoxin plays a major role in photosynthesis, especially during the light reaction.
It receives electrons from Photosystem-I and transfers them to different acceptors.
Step 2: Identify the metal present in Ferredoxin.
Ferredoxin contains iron-sulphur clusters.
These clusters are commonly represented as: \[ Fe-S \] The iron atoms present in these clusters help in electron transfer reactions.
Because iron can easily change its oxidation state, it is suitable for redox reactions.
For example, iron can shift between: \[ Fe^{2+} \] and \[ Fe^{3+} \] This property makes iron useful in electron transport proteins like ferredoxin.
Step 3: Relate Ferredoxin with photosynthesis.
During non-cyclic photophosphorylation, electrons are excited in Photosystem-I.
These electrons are transferred to ferredoxin.
Ferredoxin then helps in reducing \(NADP^+\) to \(NADPH\).
Thus, ferredoxin is directly involved in photosynthetic electron transport.
Since ferredoxin contains iron, iron is the required element.
Step 4: Analyze the given options.
Zinc is required in some enzymes but is not the characteristic metal of ferredoxin.
Magnesium is present in chlorophyll, not ferredoxin.
Copper is present in plastocyanin, another electron carrier of photosynthesis.
Iron is present in ferredoxin as part of iron-sulphur clusters.
Step 5: Final conclusion.
Therefore, the element which is a component of ferredoxin is \[ \boxed{\text{Iron}} \]
Ferredoxin is an important iron-containing protein found in plants, algae and some bacteria.
It acts as an electron carrier in several biological processes.
In plants, ferredoxin plays a major role in photosynthesis, especially during the light reaction.
It receives electrons from Photosystem-I and transfers them to different acceptors.
Step 2: Identify the metal present in Ferredoxin.
Ferredoxin contains iron-sulphur clusters.
These clusters are commonly represented as: \[ Fe-S \] The iron atoms present in these clusters help in electron transfer reactions.
Because iron can easily change its oxidation state, it is suitable for redox reactions.
For example, iron can shift between: \[ Fe^{2+} \] and \[ Fe^{3+} \] This property makes iron useful in electron transport proteins like ferredoxin.
Step 3: Relate Ferredoxin with photosynthesis.
During non-cyclic photophosphorylation, electrons are excited in Photosystem-I.
These electrons are transferred to ferredoxin.
Ferredoxin then helps in reducing \(NADP^+\) to \(NADPH\).
Thus, ferredoxin is directly involved in photosynthetic electron transport.
Since ferredoxin contains iron, iron is the required element.
Step 4: Analyze the given options.
Zinc is required in some enzymes but is not the characteristic metal of ferredoxin.
Magnesium is present in chlorophyll, not ferredoxin.
Copper is present in plastocyanin, another electron carrier of photosynthesis.
Iron is present in ferredoxin as part of iron-sulphur clusters.
Step 5: Final conclusion.
Therefore, the element which is a component of ferredoxin is \[ \boxed{\text{Iron}} \]
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