Question

Calcium binds with troponin on the actin myofilament causing a
O 1)
Thermal change
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O2)
Conformational change
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O 3)
Biochemical change
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O 4)
Chemical change
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Answer 1

answer is 2) conformation change

because :

If present, calcium ions bind to troponin, causing conformational changes in troponin that allow tropomyosin to move away from the myosin-binding sites on actin. ... Calcium then binds to troponin, causing the troponin to change shape and remove the tropomyosin from the binding sites.

Answer 2

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