This is a bit of a complex question, but overall, the idea that a banana can give you the same amount of energy as a bowl of rice is a bit of a myth.
While bananas are a great source of natural sugars, vitamins, and minerals, they don't contain the same amount of carbohydrates as a bowl of rice. A medium-sized banana contains about 27 grams of carbohydrates, while a cup of cooked rice contains around 45 grams of carbohydrates. So in terms of sheer carbohydrate content, a bowl of rice has significantly more than a banana.
That being said, the carbohydrates in rice and bananas are different types. Rice contains complex carbohydrates that break down more slowly in the body, providing a steady source of energy over a longer period of time. Bananas, on the other hand, contain simple carbohydrates that are quickly broken down into glucose and used as an immediate source of energy.
So while a banana may give you a quick burst of energy, it may not sustain you as long as a bowl of rice. However, bananas are still a great source of energy and can be a healthy addition to a balanced diet.