Which of the following proteins are critical to the body's defense against bacteria and viruses?

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Antibodies are specialized proteins produced by the immune system in response to the presence of foreign substances like bacteria and viruses in the body. These proteins bind to the foreign invaders and tag them for destruction by immune cells, thereby helping to defend the body against infections. Enzymes, buffers, and transport proteins may play important roles in various physiological processes, but they are not primarily involved in the body's defense against bacteria and viruses.

Which of the Following Proteins Are Critical to the Body's