NEET Zoology Muscle Contraction MCQ Question
Which of the following statements about muscle contraction is correct?
Actin filaments are present in the I-band of striated muscles.
Calcium ions are stored in the cytoplasm of muscle fibers.
Myosin is the only protein responsible for muscle contraction.
Muscle fibers are single-nucleated cells.
Correct Answer
Detailed Explanation
Actin filaments are indeed present in the I-band of striated muscles, while calcium ions are stored in the sarcoplasmic reticulum, myosin works in conjunction with actin for contraction, and muscle fibers are multinucleated syncytia.
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