Carbon monoxide (CO) binds to myoglobin and causes it to denature. is rapidly converted to CO2 leading to O2 release. binds to the globin portion of hemoglobin and prevents the binding of O2. binds to the Fe in hemoglobin and prevents the binding of O2. binds to the heme portion of hemoglobin and causes heme to unbind from hemoglobin.
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Step 1: Carbon monoxide binds to the iron molecule in hemoglobin. Show more…
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Carbon monoxide binds tightly to the heme groups of hemoglobin and myoglobin. How does this affinity reflect the toxicity of carbon monoxide? Select the single best answer. Carbon monoxide is not easily removed or replaced by oxygen. Carbon monoxide is easily removed or replaced by oxygen. Carbon monoxide is preferentially delivered to tissues. Carbon monoxide causes rapid heme decomposition.
Sri K.
Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron (Fe) atom. Hemoglobin and myoglobin are heterotetramers. Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind one oxygen molecule. The heme prosthetic group is entirely buried within myoglobin. Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen. Molecular oxygen binds irreversibly to the Fe(II) atom in heme. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron.
Adi S.
Why is carbon monoxide deadly? a. It binds to hemoglobin in white blood cells in place of $\mathrm{O}_{2}$ b. It binds to hemoglobin in red blood cells in place of $\mathrm{CO}_{2}$ c. neither of these choices
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