The final acceptor of electrons in the electron transport chain is molecular oxygen. Electron transport chains are used for extracting energy via redox reactions from sunlight in photosynthesis or, such as in the case of the oxidation of sugars, cellular respiration.
On their website, the American Diabetes Association directs diabetics to eat between 45-60 grams of carbohydrates at each meal. Assuming a person eats three meals a day, this advice works out to telling diabetics to eat a minimum of 135 grams to a maximum of 180 grams of carbohydrates per day.
According to the 2010 Dietary Guidelines for Americans, carbohydrates should make up 45 to 65 percent of a person's total daily calorie intake. Any amount less than this could be considered low carb. For someone consuming 2,000 calories a day, this is about 225 to 325 grams of carbohydrates per day.Most low-carb diets limit carbohydrate intake to between 50 to 150 grams per day, depending on the diet.ny amount less than this could be considered low carb. For someone consuming 2,000 calories a day, this is about 225 to 325 grams of carbohydrates per day.