At
high altitudes, the oxygen level in air is low. Climbers of very
tall mountains risk altitude sickness, which is characterized by
shortness of breath, weakness, dizziness and confusion. The early
symptoms of cyanide poisoning are the same as those for altitude
sickness. Cyanide binds tightly to Cytochrome c oxidase, a protein
complex that is the last component of mitochondrial electron
transfer chains. Cytochrome c oxidase with bound cyanide can no
longer transfer electrons. Explain why cyanide poisoning starts
with...