Which of the Following Molecules or Ions are Absent Following

Question

Which of the following molecules or ions are absent following death and leads to rigor mortis?
A) acetylcholine
B) acetylcholinesterase
C) ATP
D) calcium
E) None of these are correct.

Accepted Answer

ATP (adenosine triphosphate) is absent following death, leading to rigor mortis because it is required for muscle relaxation. Without ATP, muscles remain contracted.