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1 BIOLOGY MCQS

A balanced diet quality formula recommended by the World Health Organization is .

  • Carbohydrates 58% + Proteins 12% + Fats 30%
  • Minerals + Proteins + Fats
  • Fats + Proteins + Minerals
  • None of these
Correct Answer: A. Carbohydrates 58% + Proteins 12% + Fats 30%

Detailed Explanation

A balanced diet provides the human body with all the essential nutrients, energy, and building materials required for healthy growth, development, and proper functioning. According to the World Health Organization (WHO) and various nutritional science recommendations, a well-balanced diet should maintain an optimal macronutrient distribution to support energy needs and prevent chronic diseases.


The recommended quality formula for a balanced diet is approximately:




  • Carbohydrates: 55–60% of total daily energy intake




  • Proteins: 10–15% of total daily energy intake




  • Fats: 25–30% of total daily energy intake




Among the given options, Carbohydrates 58% + Proteins 12% + Fats 30% closely matches WHO guidelines and is considered the ideal macronutrient ratio for an average adult.


Role of Each Macronutrient:




  1. Carbohydrates (58%)




    • Main energy source for the body and brain.




    • Found in rice, wheat, bread, fruits, and vegetables.




    • Should mainly come from whole grains and complex carbs to avoid spikes in blood sugar.






  2. Proteins (12%)




    • Provide amino acids essential for building and repairing tissues, making enzymes, and supporting immunity.




    • Sources: meat, fish, eggs, milk, legumes, and nuts.






  3. Fats (30%)




    • Required for energy storage, absorption of fat-soluble vitamins (A, D, E, K), hormone production, and organ protection.




    • Healthy fats from olive oil, seeds, and fish are recommended over trans fats.






Other components like vitamins, minerals, fiber, and water are also vital but are consumed in smaller amounts and do not directly supply energy.Therefore, based on WHO recommendations, the best formula for a balanced diet is Carbohydrates 58% + Proteins 12% + Fats 30%, making Option A the correct answer.

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