From which of the following food sources can incomplete proteins typically be obtained?

• A. Fish
• B. Legumes
• C. Eggs
• D. Chicken

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the concept of incomplete proteins. Incomplete proteins are those that lack one or more of the essential amino acids required by the body. Essential amino acids cannot be synthesized by the body and must be obtained through diet.
2. Step 2: Recognize the food sources that typically provide incomplete proteins. Plant-based foods, such as legumes, grains, nuts, and seeds, are common sources of incomplete proteins. Animal-based foods, like fish, eggs, and chicken, generally provide complete proteins, which contain all essential amino acids.
3. Step 3: Analyze the options provided in the question. Fish, eggs, and chicken are animal-based foods, and they are known to provide complete proteins. Legumes, on the other hand, are plant-based and typically provide incomplete proteins.
4. Step 4: Confirm that legumes are the correct answer based on their classification as a plant-based food source that lacks one or more essential amino acids.
5. Step 5: Conclude that legumes are the food source from which incomplete proteins can typically be obtained, as opposed to the other options listed, which are sources of complete proteins.