The synthesis of fatty acids is known as
Multiple Choice
A lipogenesis
Bglycogenesis
C beta-oxidation
D lipolysis
The correct answer and explanation is:
Correct Answer: A. Lipogenesis
Explanation:
Lipogenesis is the metabolic process by which fatty acids are synthesized from acetyl-CoA and NADPH in the cytoplasm of cells, primarily in the liver and adipose (fat) tissue. This process is essential for energy storage and involves converting excess carbohydrates and proteins into fatty acids, which are then esterified to form triglycerides (fats).
Why It’s the Correct Answer:
- The term “lipo-“ refers to fat, and “genesis” means creation. So lipogenesis literally means the creation of fat.
- This process begins with acetyl-CoA, which is converted into malonyl-CoA by the enzyme acetyl-CoA carboxylase (ACC).
- Then, fatty acid synthase (FAS) catalyzes the stepwise addition of 2-carbon units to build long-chain fatty acids, most commonly palmitic acid (C16:0).
Incorrect Options Explained:
- B. Glycogenesis: This is the formation of glycogen from glucose, mainly occurring in the liver and muscle tissues. It is related to carbohydrate storage, not fat synthesis.
- C. Beta-oxidation: This is the breakdown of fatty acids into acetyl-CoA in the mitochondria, used for energy production. It is essentially the opposite of lipogenesis.
- D. Lipolysis: This is the breakdown of triglycerides (stored fat) into glycerol and free fatty acids, primarily for energy. It also opposes lipogenesis.
Conclusion:
Lipogenesis is the correct term for the synthesis of fatty acids, especially when the body needs to store excess energy. It plays a key role in energy metabolism, weight gain, and the body’s response to high-carbohydrate diets.