Question

select the correct answer.

which statement best defines micronutrients?

micronutrients can be synthesized only by microbial organisms.
micronutrients are required by the body in small quantities.
micronutrients are essential only for infants and children.
micronutrients are naturally made by the body.

Explanation:

Analyze the term "micronutrient"

The term "micronutrient" is composed of the prefix "micro-" (meaning small) and "nutrient" (a substance that provides nourishment essential for growth and the maintenance of life). In biology and nutrition, nutrients are categorized into macronutrients (needed in large amounts, like carbohydrates, proteins, and fats) and micronutrients (needed in much smaller amounts, like vitamins and minerals).

Evaluate the first option

The first option states: "Micronutrients can be synthesized only by microbial organisms." This is incorrect. Many micronutrients (such as vitamins and essential minerals) are obtained from a wide variety of dietary sources, including plants and animals, and are not exclusively synthesized by microbes.

Evaluate the second option

The second option states: "Micronutrients are required by the body in small quantities." This aligns perfectly with the scientific definition of micronutrients. While they are essential for vital physiological functions, the body only needs them in milligrams or micrograms daily.

Evaluate the third option

The third option states: "Micronutrients are essential only for infants and children." This is incorrect. Micronutrients are essential for humans of all ages, from infancy through adulthood and old age, to maintain proper metabolic functions, cellular repair, and overall health.

Evaluate the fourth option

The fourth option states: "Micronutrients are naturally made by the body." This is incorrect. Most micronutrients cannot be synthesized by the human body at all (or cannot be made in sufficient amounts) and therefore must be obtained through diet, making them essential nutrients.

Answer:

• Micronutrients can be synthesized only by microbial organisms.
• Micronutrients are required by the body in small quantities. (Correct answer)
• Micronutrients are essential only for infants and children.
• Micronutrients are naturally made by the body.