Question

The muscles of a dead body can remain in contracted state termed rigor - mortis for several hours, due to the lack of : 1) Calcium ions needed to bind troponin 2) ATP needed to break acto-myosin complex 3) Oxygen supply needed for myosin 4) Phosphorylated myosin

Answer 1

Answer:

ATP needed to break acto-myosin complex

Step-by-step explanation:

When  the body is dead, all actin gets attached with myosin and the bond cannot be broken because of the absence of ATP

Answer 2

The muscles of a dead body can remain in a contracted state termed rigor - mortis for several hours, due to the lack of ATP needed to break the actomyosin complex. (Option 2)

• Rigor mortis is a condition post-death where the joints and muscles become stiff due to the muscles' inability to contract or relax.
• The body stops producing any energy (ATP) and there is a formation of complex actomyosin in muscles.
• The body stays in this state for 1 to 4 days after the death of the individual.
• This stiffening ends as the body starts to decompose.