Which of the following muscular disorders is inherited? [2019]
Correct answer: C — Muscular dystrophy
Muscular dystrophy is an inherited genetic disorder characterized by progressive muscle degeneration and weakness. It's caused by mutations in genes responsible for muscle protein production. Tetany is caused by low calcium levels, myasthenia gravis is autoimmune, and botulism is caused by bacterial toxins. NCERT mentions genetic disorders as inherited conditions passed from parents to offspring through faulty genes.
Muscular dystrophy: Progressive degeneration of skeletal muscle mostly due to genetic disorder.
Muscular dystrophy is a progressive genetic disorder causing skeletal muscle degeneration, which affects locomotion and movement. NTA tests whether students understand that it's primarily a hereditary condition, not an acquired disease from poor exercise or nutrition. Students often confuse it with muscle atrophy from disuse. Remember: muscular dystrophy is genetic (inherited mutations in muscle genes), progressive (worsens over time), and specifically affects skeletal muscles. Know the distinction between genetic muscular dystrophy and reversible muscle weakness from other causes.
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