Practice MCQ Questions and answers on Biology-GK

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6.
When the diaphragm and external intercostal muscles contract,

A. The volume of the thorax decreases

B. The volume of the lungs decreases

C. The volume of the thorax increases

D. The lungs shrink

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7.
Blood leaving lungs, is rich in

A. Oxygen

B. Carbondioxide

C. Haemoglobin

D. Number of RBC

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8.
The organs protected by the thoracic cage include the

A. Lungs

B. Heart

C. Both a & b

D. None of the above

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9.
By complete oxidation of glucose number of ATP molecule formed is

A. 2

B. 28

C. 38

D. 48

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10.
If CO₂ concentration in the blood increases, the breathing will

A. Increase

B. Decrease

C. Stop

D. No effect

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Practice MCQ Questions and answers on Biology-GK

6. When the diaphragm and external intercostal muscles contract,

Answer & Solution

7. Blood leaving lungs, is rich in

Answer & Solution

8. The organs protected by the thoracic cage include the

Answer & Solution

9. By complete oxidation of glucose number of ATP molecule formed is

Answer & Solution

10. If CO2 concentration in the blood increases, the breathing will

Answer & Solution

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6.
When the diaphragm and external intercostal muscles contract,

7.
Blood leaving lungs, is rich in

8.
The organs protected by the thoracic cage include the

9.
By complete oxidation of glucose number of ATP molecule formed is

10.
If CO₂ concentration in the blood increases, the breathing will