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(D) The binding of $O_2$ with hemoglobin is primarily determined by the partial pressure of oxygen $(P_{O_2})$.However,other factors such as partial p

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$a, b, c$ and $d$

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(D) The binding of $O_2$ with hemoglobin is primarily determined by the partial pressure of oxygen $(P_{O_2})$.However,other factors such as partial pressure of carbon dioxide $(P_{CO_2})$,hydrogen ion concentration ($H^+$ concentration),and temperature also significantly influence this binding affinity.According to the oxygen dissociation curve,high $P_{O_2}$,low $P_{CO_2}$,low $H^+$ concentration (high $pH$),and lower temperature favor the formation of oxyhemoglobin in the alveoli.Conversely,low $P_{O_2}$,high $P_{CO_2}$,high $H^+$ concentration,and higher temperature favor the dissociation of oxygen from oxyhemoglobin in the tissues.Therefore,all four factors $(a, b, c, d)$ contribute to the binding and dissociation process of $O_2$ with hemoglobin.

Which of the following factors contribute to the binding of $O_2$ with hemoglobin?

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What are $P$ and $Q$ in the given reaction?
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