Hypoxia: Cellular Oxygen Deficiency — NEET Biology
📚 Practice ConceptHave you heard about hypoxia? Try to gather information about it, and discuss with your friends.
Assertion (A): All oxygen in blood is transported by red blood cells. Reason (R): Red blood cells contain haemoglobin which binds with oxygen to form oxyhaemoglobin.
View solution & NCERT explanation
Correct answer: D — If the assertion is false but the reason is true.
NCERT states “About 97 per cent of O2 is transported by RBCs in the blood” - the qualifier “about 97 per cent” indicates that not ALL oxygen is carried by RBCs. The remaining 3% is carried dissolved in plasma. Assertion is false by removing the qualifier. NCERT confirms “O2 can bind with haemoglobin in a reversible manner to form oxyhaemoglobin” making the Reason true. This tests whether students know exceptions exist to RBC transport.
What does NCERT say about Have you heard about?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.