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Friday, 9 October

NEET UG 2021 · Zoology · Question 169

NEET 2021 Zoology, question 169

Question 169 of the NEET 2021 paper (code O1) is a Zoology question from Breathing and Exchange of Gases. Its idea, Alveolar Conditions for Oxyhemoglobin, was asked 3 times, in 2020, 2021 and 2024, across NEET 2017–2026. The NTA final answer key gives option 3.

Updated 2026-10-08

Q169 · Zoology

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

  1. 1High pO2\mathrm{pO_2}, high pCO2\mathrm{pCO_2}, less H+\mathrm{H^{+}}, higher temperature
  2. 2Low pO2\mathrm{pO_2}, low pCO2\mathrm{pCO_2}, more H+\mathrm{H^{+}}, higher temperature
  3. 3High pO2\mathrm{pO_2}, low pCO2\mathrm{pCO_2}, less H+\mathrm{H^{+}}, lower temperatureOfficial answer
  4. 4Low pO2\mathrm{pO_2}, high pCO2\mathrm{pCO_2}, more H+\mathrm{H^{+}}, higher temperature

Official answer: option 3 · NTA final answer key

Same idea

Alveolar Conditions for Oxyhemoglobin, in other papers

NEET asked this idea 3 times, in 2020, 2021 and 2024. The other 2 questions below.

  • 2024 Q171Which of the following factors are favourable for the formation of oxyhaemoglobin in alveoli?One-line MCQ · Easy
  • 2020 Q19Identify the wrong statement with reference to transport of oxygen.One-line MCQ · Medium

Alveolar Conditions for Oxyhemoglobin: every question and how it was framed

The chapter

Breathing and Exchange of Gases in ten years of NEET

17 questions from 2017–2026, asked in 9 of 10 papers, about 1.6 a paper. Oxygen Dissociation Curve alone had 6.

Chapter analysisStudy this chapterPractise this chapter

Breathing and Exchange of Gases: questions per paper

0241’173’182’192’203’212’221’232’241’250’26