AIIMS 2014 Zoology Rigor Mortis MCQ Question
Assertion Rigor mortis is the state of body stiffening prior to death. Reason It is due to relaxation of actin and myosin filaments.
Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are false
Correct Answer
Detailed Explanation
The correct answer is D because the assertion that rigor mortis is the state of body stiffening prior to death is false; rigor mortis occurs after death, as a result of chemical changes in the muscles. Additionally, the reason given—stating that it is due to relaxation of actin and myosin filaments—is also incorrect; rigor mortis is actually caused by the inability of these filaments to detach due to the lack of ATP, leading to muscle stiffness.
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