Carbonic anhydrase is found in

Which protein is essential for the transport of $O_2$?

Hamburger phenomenon is also known as

What conditions in the alveoli favor the dissociation of carbon dioxide from carbaminohemoglobin?

If $ppCO_2$ is high and pH is low,then it will result in:
$i$. increase in affinity of haemoglobin for $O_2$
$ii$. decrease in affinity of haemoglobin for $O_2$
$iii$. oxygen dissociation curve shifts to left
$iv$. causes release of $O_2$ for diffusion into tissue cells
$v$. $H^+$ and $HCO_3^-$ ions combine to form carbonic acid

What percentage of $O_2$ is transported by hemoglobin (in $\%$)?