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How many calories are in 1 gram of carbohydrate?

  1. 2 calories

  2. 4 calories

  3. 7 calories

  4. 9 calories

The correct answer is: 2 calories

One gram of carbohydrate provides 4 calories, not 2 calories, 7 calories, or 9 calories. Carbohydrates are one of the main sources of energy for the body. When broken down during digestion, carbohydrates provide 4 calories per gram, making them a significant energy source for the body.