NEET 2020 Model Question Paper 4

Read the following statements related to the skeletal muscle and choose the correct option.
(I) Binding of calcium with a sub unit of troponin, removes the masking of actin binding sites on myosin
(II) After muscle contraction, Ca‌++ ions are pumped back to the sarcoplasmic cistemae which results in masking of active sites of actin filaments ;