The dissociation curve is associated with

Binding of $O_{2}$ with haemoglobin is primarily dependent upon:
$I.$ Partial pressure of $O_{2}$
$II.$ Partial pressure of $CO_{2}$
$III.$ Hydrogen ion concentration
$IV.$ Temperature
Choose the correct option.

$CO_2$ is transported in blood primarily as:

Oxyhemoglobin acts as which of the following?

The toxic effect of carbon monoxide is due to its higher affinity for hemoglobin compared to oxygen. How many times higher is this affinity (in $\text{times}$)?

High percentage of $CO_{2}$ is transported in dissolved form as compared to $O_{2}$. This is because