Which statement is true about the proportion of glucose that is oxidized versus stored as glycogen?

Which statement is true about the proportion of glucose that is oxidized versus stored as glycogen?

• A. Most is stored as glycogen
• B. Most is oxidized
• C. All is oxidized
• D. None is oxidized

Answer: (D)

Glucose is mainly used to produce energy. In most tissues, glucose is rapidly oxidized through glycolysis, the TCA cycle, and oxidative phosphorylation to generate ATP for daily cellular work. A portion of glucose is stored as glycogen, primarily in the liver and, to a lesser extent, in muscle, via glycogenesis, but glycogen stores are limited. When energy needs are met and glucose is abundant, some is redirected into glycogen; once storage capacity is reached, excess glucose can be converted to fat. Therefore, the idea that none is oxidized is incorrect, while the most accurate general statement is that most glucose is oxidized for energy, with a smaller, finite portion stored as glycogen.

Glucose is mainly used to produce energy. In most tissues, glucose is rapidly oxidized through glycolysis, the TCA cycle, and oxidative phosphorylation to generate ATP for daily cellular work. A portion of glucose is stored as glycogen, primarily in the liver and, to a lesser extent, in muscle, via glycogenesis, but glycogen stores are limited. When energy needs are met and glucose is abundant, some is redirected into glycogen; once storage capacity is reached, excess glucose can be converted to fat. Therefore, the idea that none is oxidized is incorrect, while the most accurate general statement is that most glucose is oxidized for energy, with a smaller, finite portion stored as glycogen.