Which of the following statements is true of essential amino acids?

• A. They can be synthesized by the human body.
• B. They must be obtained through the diet.
• C. They are not necessary for protein synthesis.
• D. They are only required during periods of growth.

Answer: (B)

Verified step by step guidance

1. Understand the definition of essential amino acids: Essential amino acids are those that cannot be synthesized by the human body and must be obtained through the diet.
2. Recognize the role of essential amino acids in protein synthesis: Essential amino acids are crucial for protein synthesis, as they are the building blocks of proteins.
3. Differentiate between essential and non-essential amino acids: Non-essential amino acids can be synthesized by the body, whereas essential amino acids cannot.
4. Consider the importance of essential amino acids throughout life: Essential amino acids are required at all stages of life, not just during periods of growth.
5. Identify the correct statement: Based on the definitions and roles, the statement 'They must be obtained through the diet' is true for essential amino acids.