Question:
Beta‐oxidation occurs in__________
Beta‐oxidation occurs in__________
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Beta-oxidation gets its name because the oxidative attack happens at the $\beta$-carbon (the 3rd carbon) of the fatty acid chain.
Updated On: Aug 7, 2026
- Proteins
- Lipids
- Carbohydrates
- Amino acids
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
The question asks which class of macronutrients undergoes the metabolic pathway known as Beta-oxidation.
Step 2: Detailed Explanation:
• Mechanism: Beta-oxidation is the primary catabolic process for fatty acids. It occurs within the mitochondria of the cell.
• Process: Long-chain fatty acids are broken down in a cycle of four steps (oxidation, hydration, oxidation, and cleavage). During each cycle, a two-carbon unit is removed as Acetyl-CoA.
• Relationship to Lipids: Lipids (specifically triglycerides) are first hydrolyzed into glycerol and free fatty acids. These fatty acids then enter the beta-oxidation cycle to generate energy in the form of ATP through the TCA cycle and electron transport chain.
• Other pathways:
• Carbohydrates mainly undergo Glycolysis.
• Proteins/Amino acids undergo Deamination or Transamination.
Step 3: Final Answer:
Beta-oxidation is exclusively the pathway for fatty acid (lipid) degradation. Option (B) is correct.
The question asks which class of macronutrients undergoes the metabolic pathway known as Beta-oxidation.
Step 2: Detailed Explanation:
• Mechanism: Beta-oxidation is the primary catabolic process for fatty acids. It occurs within the mitochondria of the cell.
• Process: Long-chain fatty acids are broken down in a cycle of four steps (oxidation, hydration, oxidation, and cleavage). During each cycle, a two-carbon unit is removed as Acetyl-CoA.
• Relationship to Lipids: Lipids (specifically triglycerides) are first hydrolyzed into glycerol and free fatty acids. These fatty acids then enter the beta-oxidation cycle to generate energy in the form of ATP through the TCA cycle and electron transport chain.
• Other pathways:
• Carbohydrates mainly undergo Glycolysis.
• Proteins/Amino acids undergo Deamination or Transamination.
Step 3: Final Answer:
Beta-oxidation is exclusively the pathway for fatty acid (lipid) degradation. Option (B) is correct.
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