A newborn baby dies soon after birth because her diaphragm and rib cage muscles failed to contract and she was unable to breathe on her own. Examination of the baby's DNA revealed that she had a genetic mutation in a gene that encoded a calcium-binding protein. Which protein was most likely defective in the baby?

A. Tropomyosin
B. Actin
C. Troponin
D. Acetylcholine
E. Myosin


Answer: C

Biology & Microbiology

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