Question

What is Bohr's effect?

• A. A rise in levels of $pC{O}_2$ or fall in $pH$ decreases the oxygen affinity of haemoglobin
• B. Decrease in levels of $pC{O}_2$ or fall in $pH$ decreases the oxygen affinity of haemoglobin
• C. A rise in levels of $pC{O}_2$ or increase in $pH$ decreases the oxygen affinity of haemoglobin
• D. Shifting of the oxygen-haemoglobin curve to left

Answer 1

Answer: (A)

Bohr's effect is described as a rise in $pC{O}_2$ (or fall in $pH$ ) which decreases the oxygen affinity of haemoglobin thus, raising the $P_{50}$ value and shifts the curve to the right. Conversely, a fall in $pC{O}_2$ and rise in the $pH$ increases oxygen affinity of haemoglobin $(P_{50}$ value is the value of $p{O}_2$ at which haemoglobin is $50\%$ saturated with oxygen to form haemoglobin).