Biologyeasy · Past Paper
Which gas do humans inhale most for the purpose of cellular respiration?
ACarbon dioxide
BNitrogen
COxygen
DHydrogen
✓ Correct Answer: C — Oxygen
Oxygen is required by cells to break down glucose and produce energy (ATP) during respiration.
Share this question
More from Biology
- If a man with color blindness marries a woman with normal vision (non-carrier), what is the chance their son will be color blind?
- The term 'Mitosis' was coined by:
- Which of the following is known as the 'physical basis of life'?
- What causes the 'Lub' sound of the heart?
- In a dihybrid cross between RRYY (Round Yellow) and rryy (Wrinkled Green), what is the phenotype of the F1 offspring?