NEET 2018 Biology question

Calcium is important in skeletal muscle contraction because it

(1)Detaches the myosin head from the actin filament.
(2)Activates the myosin ATPase by binding to it.
(3)Binds to troponin to remove the masking of active sites on actin for myosin.Correct
(4)Prevents the formation of bonds between the myosin cross bridges and the actin filament.

Answer: (3)

Solution

When a nerve impulse reaches the muscle, is released from the sarcoplasmic reticulum into the sarcoplasm. It binds to the subunit of troponin (troponin C) on the thin filament, causing a conformational change that moves tropomyosin and

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-092362