Microbiology deals with which area?

• A. The regulation of hormones
• B. Bacterial and viral infections
• C. The study of bones
• D. The function of the kidneys

Answer: (B)

Microbiology centers on microscopic organisms and how they cause disease and affect health. The option describing bacterial and viral infections fits this focus best because it directly concerns diseases produced by microbes and how those infections are diagnosed, treated, and prevented. Other choices point to areas like hormones (endocrinology), bones (osteology/orthopedics), or kidney function (nephrology), which are studied in different fields and not the core area of microbiology.