At what partial pressure of oxygen (in mmHg) is hemoglobin nearly fully saturated with oxygen?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Biology Mcqsbiology-mcqs
Published
23 May 2018
Last updated
28 May 2026

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Explanation

Hemoglobin reaches almost complete oxygen saturation at an oxygen partial pressure of approximately 100 mmHg. Lower pressures such as 10 mmHg or 60 mmHg result in significantly less oxygen binding.

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