Why were scientists surprised with the actual number of genes they found in the human genome?

scientists were surprised about how much the DNA molecule could do, because they thought that only what type of molecules could give instructions and be copied during cell division?

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image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.