Which of the following is a true statement about the digestion and absorption of proteins?
A. Many whole proteins are absorbed by phagocytosis and enter the blood.
B. Polypeptide chains are digested to yield individual amino acids, which can be absorbed into the blood.
C. The products of protein digestion are first absorbed into the lymphatic system, which empties into the blood.
D. Polypeptide chains are digested to yield dipeptides, which can be absorbed into the blood.
Answer: B
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