In a muscle cell, myosin binds to actin to cause muscle contraction. Researchers have found that rabbit muscle myosin binds to actin from an amoeba. How can this be?

Question

Quizplus · Accepted Answer

The correct answer is E because all the statements contribute to explaining why rabbit myosin can bind to actin from an amoeba. A) highlights the evolutionary aspect, suggesting a distant common ancestor. B) points out that despite differences, the crucial actin-binding site remains unaffected. C) emphasizes the conservation of important proteins across species. D) combines A and B, reinforcing the idea of evolutionary conservation and functional specificity at the actin-binding site.

In a Muscle Cell, Myosin Binds to Actin to Cause