Question

# Oxygen haemoglobin dissociation curve will shift to right on decrease of

A
Acidity
B
Carbon dioxide concentration
C
Both A and B
D
pH

Solution

## The correct option is D pHA decrease in pH (increase in $$H^+$$ ion concentration) shifts the standard curve to the right, while an increase shifts it to the left. This occurs because at greater $$H^+$$ ion concentration. So, with increased acidity, the haemoglobin binds less $$O_2$$ for a given $$PO_2$$ (and more $$H^+$$). This is known as the Bohr effect.Biology

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