Which part of cellular respiration would be stopped if arsenic were ingested?

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

2%? i tried finding the exact sorry if it's not 100% correct ; -;