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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases1 Mark
MCQ
Mark the incorrect statement in context to $O_2$ binding to $Hb$:
  • ✓
    Higher $pH.$
  • B
    Lower temperature.
  • C
    Lower $\ce{pCO_2}$
  • D
    Higher $\ce{pO_2}$
✓

Answer

Correct option: A.
Higher $pH.$
Binding of oxygen with haemoglobin is primarily related to partial pressure of $O_2$. In alveoli, high $pO$, low $\ce{pCO_2}$, less $H$ concentration and lower temperature facilitate formation of oxyhaemoglobin.

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