MHT CET · BIOLOGY · STD 12 - 8. Respiration and Circulation

Given below are two statements:
Statement I: The relationship between \(\mathrm{HbO}_2\) saturation and oxygen tension \((\mathrm{ppCO}_2\)) is called oxygen-dissociation curve.
Statement II: Oxygen dissociation curve shifts towards the right due to decrease in \(ppCO _2\) and decrease in temperature.
In the light of above statements, choose the most appropriate answer from the options given below.

A Statement I is correct but Statement II is incorrect.
B Statement I is incorrect but Statement II is correct.
C Both Statement I and Statement II are correct.
D Both Statement I and Statement II are incorrect.

Verified Solution

Answer & Solution

Correct Answer

(A) Statement I is correct but Statement II is incorrect.

Step-by-step Solution

Detailed explanation

Oxygen dissociation curve shifts towards the right due to increase in \(ppCO _2\) and rise in temperature.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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