Ketones are a byproduct of protein metabolism. A True B
The Correct Answer and Explanation is:
The correct answer to the question is B: False.
Explanation:
Ketones are primarily a byproduct of fat metabolism, not protein metabolism. When the body undergoes periods of fasting, low carbohydrate intake, or prolonged exercise, it shifts its metabolic focus from using glucose as a primary energy source to breaking down fats for energy. This process leads to the production of ketones in the liver, a process known as ketogenesis.
Proteins, on the other hand, are metabolized through a different pathway. The body breaks down proteins into amino acids, which are primarily used for building and repairing tissues, producing enzymes, and supporting immune function. Under certain circumstances, such as during prolonged starvation or when carbohydrate availability is low, some amino acids can be converted into glucose via a process called gluconeogenesis. However, this process does not directly produce ketones.
Ketones include compounds like acetoacetate, beta-hydroxybutyrate, and acetone, and their production is linked to fat metabolism. When fats are broken down, fatty acids are converted into acetyl-CoA, which enters the citric acid cycle. When there is a surplus of acetyl-CoA and insufficient glucose, the excess acetyl-CoA is converted into ketones, which can then be used as an alternative fuel source by tissues like the brain and muscles.
Therefore, the statement that ketones are a byproduct of protein metabolism is incorrect, and the correct response to the question is B: False.
