Question

Left shift of oxyhemoglobin curve is noticed under-

• A. Normal temperature and pH
• B. Low temperature and high pH
• C. Low pH and low temperature
• D. Low pH and high temperature

Answer 1

The correct option is B

Low temperature and high pH

The correct answer is option B.

Explanation of the correct option:

1. Left shift of the oxyhemoglobin curve means the association of oxygen with hemoglobin.
2. This association takes place under low temperatures and high pH.
3. Low temperature confers to the high partial pressure of oxygen.

Figure showing left shift of the oxyhemoglobin curve:

Explanation of the incorrect options:

Option A:

Under normal temperature and pH, there will not be any association of oxygen with hemoglobin.

Option C:

Low pH comprehends an acidic condition that won't be a preferable condition for the association of oxygen with hemoglobin.

Option D:

Low pH and high temperature mean high partial pressure of carbon dioxide which will lead to the dissociation of oxygen with hemoglobin.

Final answer: Left shift of oxyhemoglobin curve is noticed under low temperature and high pH.