Besides oxygen, which of the following gases can bind to the heme group of hemoglobin?

Name: Besides oxygen, which of the following gases can bind to the heme group of hemoglobin?
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Question

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Carbon monoxide (CO) is known to bind strongly to the heme group of hemoglobin, forming carboxyhemoglobin, which reduces the amount of oxygen that can bind to hemoglobin and can be potentially fatal if levels are high enough. None of the other choices listed have been reported to bind to the heme group of hemoglobin.

Besides Oxygen, Which of the Following Gases Can Bind to the Heme