Each haemoglobin molecule can carry a maximum of

In mammals,how much $CO_2$ is transported as bicarbonates of sodium and potassium in the blood?

With reference to the oxyhaemoglobin dissociation curve,select the $INCORRECT$ statement/statements.
$I$. $100\%$ saturation is very common.
$II$. $95-97\%$ saturation takes place at $ppO_2 = 100 \text{ mm Hg}$ in alveoli.
$III$. At $30 \text{ mm Hg}$ of $ppO_2$,only $50\%$ saturation can be maintained.
$IV$. The oxyhaemoglobin dissociation curve is $J$-shaped.
Select the correct option.

State the different modes of $CO_2$ transport in blood.

How much higher is the affinity of carbon monoxide for hemoglobin compared to oxygen (in $\times$)?

Which is called Hamburger shift?