Lesson eLearning

Which of the following best describes the shape of the oxygen‑hemoglobin dissociation curve?

easy MCQ 1 mark Class 11 · Biology · Breathing and Exchange of Gases
  1. Linear
  2. Sigmoidal
  3. Inverse
  4. Exponential
Answer
Sigmoidal

The correct answer is Sigmoidal — Step 4: Select that option as the answer.

Step-by-step solution

  1. Step 1: Recognise that oxygen binding to hemoglobin shows positive cooperativity.
  2. Step 2: Positive cooperativity leads to a sigmoidal (S‑shaped) curve.
  3. Step 3: Identify the correct option that states "Sigmoidal".
  4. Step 4: Select that option as the answer.
Common mistake: Assuming a linear relationship

Concept tested: Oxygen‑hemoglobin affinity

Published · How this solution was prepared and checked

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