Which of the following can only be classified as a building block for the human body? a. fats b. proteins c. simple carbohydrates d. complex carbohydrates

B. proteins

Explanation:

Proteins are substances that form all living things. From microscopic organisms to large animals and plants, everyone depends on proteins for their development and growth. For this reason, we can say that among the options shown in the question above, proteins are the essential molecules for the human body.

Proteins perform the most varied functions: they help in the structural formation of organisms, they act in cellular metabolism, they help to transport substances, they act in muscle contraction, they also constitute the antibodies, which defend our body, form some hormones, among other important actions. Among the main known proteins, we can mention hemoglobin, which is responsible for the oxygen transport in red blood cells, and keratin, which is present in our nails and hair.

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