Question
The process of synthesizing ATP from ADP and Pi coupled with electron transport chain is:
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Oxidative phosphorylation
Oxidative Phosphorylation: ATP Synthesis Mechanism
The process described involves the synthesis of Adenosine Triphosphate (ATP) from Adenosine Diphosphate (ADP) and inorganic phosphate (Pi), directly coupled with the electron transport chain (ETC). This specific mechanism is known as oxidative phosphorylation.
Key Process Overview
- The electron transport chain utilizes energy released from the transfer of electrons to pump protons across a membrane, creating an electrochemical gradient.
- ATP synthase uses the potential energy stored in this proton gradient to synthesize ATP from ADP and Pi.
- This is the primary method of ATP production in aerobic respiration.
Analyzing Other Options
- Gluconeogenesis: The synthesis of glucose from non-carbohydrate precursors.
- $\beta$- Oxidation: The breakdown of fatty acids to produce acetyl-CoA, which enters the citric acid cycle.
- Reductive phosphorylation: ATP synthesis coupled to reduction reactions, distinct from the ETC-driven process.
Conclusion
Therefore, the synthesis of ATP from ADP and Pi coupled with the electron transport chain is specifically termed Oxidative phosphorylation.
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