Home » Which of the following is the most important energy source of carbohydrates in the mammals? Carbohydrates MCQs Which of the following is the most important energy source of carbohydrates in the mammals? January 18, 2022 7 Views Q. Which of the following is the most important energy source of carbohydrates in the mammals? A. Glucose B. Amino acid C. Lipid D. DNA Answer: Glucose