Which of the following is the correct classification of carbohydrates?

Analyze the question The question asks which category carbohydrates belong to among the options given: lipid, phytonutrient, macronutrient, or micronutrient.

Explain the concept Nutrients are grouped by how much the body needs:

• Macronutrients are needed in large amounts. They are carbohydrates, proteins, and fats (lipids), and they supply energy and building material.
• Micronutrients are needed in small amounts. They are vitamins and minerals, and they regulate body processes.
• Phytonutrients are plant-based compounds (such as flavonoids and carotenoids) that offer health benefits but are not essential nutrients.
• Lipids are a separate class of organic compounds (fats, oils, waxes). They are not carbohydrates.

Step-by-step solution

1. Carbohydrates (sugars, starch, cellulose) are made of carbon, hydrogen and oxygen, usually in the ratio CₓH₂ₙOₙ.
2. They are not lipids, since lipids are a different biomolecule group. This rules out A.
3. They are not phytonutrients, which are specific plant-derived chemicals. This rules out B.
4. They are not vitamins or minerals, and the body needs them in large quantities, not small ones. This rules out D.
5. Carbohydrates are the body's main energy source, needed in large amounts, so they are macronutrients.

Answer: C. Macronutrient

Exam tip Remember "Macro = Many, Major": carbohydrates, proteins, and fats are the big three. Micro = Minute: vitamins and minerals. If a question asks about nutrients needed in large quantities, think of the "big three" first.