Explore topic-wise biology questions.
4 questions · Page 1 of 1
Which gas is absorbed and which is released by plants during respiration?
O₂ absorbed, CO₂ released
CO₂ absorbed, O₂ released
N₂ absorbed, O₂ released
O₂ absorbed, N₂ released
Correct Answer: A — O₂ absorbed, CO₂ released
Explanation:
During respiration, plants (like animals) absorb O₂ and release CO₂. This is the reverse of photosynthesis.
Deficiency of which vitamin causes Scurvy?
Vitamin A
Vitamin B12
Vitamin C
Vitamin K
Correct Answer: C — Vitamin C
Explanation:
Scurvy is caused by deficiency of Vitamin C (ascorbic acid), leading to bleeding gums and weakness.
Which part of the human brain is responsible for maintaining balance and coordination?
Cerebrum
Medulla oblongata
Cerebellum
Hypothalamus
Correct Answer: C — Cerebellum
Explanation:
The cerebellum coordinates voluntary movements and is responsible for balance and posture.
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Right atrium
Right ventricle
Left atrium
Left ventricle
Correct Answer: D — Left ventricle
Explanation:
The left ventricle pumps oxygenated blood into the aorta, from which it is distributed to the entire body.
