Which of the following is a reason that glucose is a common metabolic fuel used by living organisms?

Question

Quizplus · Accepted Answer

Choice A is partially true, as glucose does have a stable ring structure, but it is not necessarily the reason it is a common metabolic fuel. 
Choice B is a valid reason, as glucose has been shown to be one of the monosaccharides formed under prebiotic conditions, meaning it was available early in the evolution of life. 
Choice C is false, as the brain can use other metabolic fuels besides glucose, such as ketones. 
Therefore, the best answer is D, as it includes the valid reason from choice B and eliminates the false reason from choice C.

Which of the Following Is a Reason That Glucose Is