10th Class Chapter No.1
Biology MCQs Online Quiz
All MCQs Selected from Old Board Papers
Best MCQs for Board Examination
Total MCQs ( in this Quiz ) = 50
71. Lowering of diaphragm results in:
A. inspiration
B. expiration
C. digestion
D. excretion
Answer:
A. inspiration
72. When you breathe out, what gas does the body get rid of?
A. when you breathe out your body gets rid of nitrogen gas
B. when you breathe out your body gets rid of CO2
C. when you breathe out your body gets rid of O2
D. when you breathe out your body gets rid of carbon monooxide gas
Answer:
B. when you breathe out your body gets rid of CO2
73. How many phases involve in breathing?
A. two
B. Three
C. Four
D. Five
Answer:
A. two
74. When you inhale, your lungs:
A. inflate
B. turn purple
C. deflate
D. disappear
Answer:
A. inflate
75. After gaseous exchange in the lungs, impure air is expelled out in:
A. inhalation
B. inspiration
C. in take of O
D. exhalation
Answer:
D. exhalation
