CBSE Class 7 Science Respiration in Organisms MCQs

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Respiration in Organisms


1.  The process of breakdown of food in the cell with the release of energy is called ________ 

a.  Respiration b.  Inhalation  c.  Exhalation  d.  Breathing

2.  Taking in air rich in oxygen into the body is called _________ 

a.  Respiration b.  Inhalation  c.  Exhalation  d.  Breathing

3.  Giving out of air rich in carbon dioxide is called __________  

a.  Respiration  b.  Inhalation  c.  Exhalation  d.  Breathing

4.  An adult human being at rest breathes in and out for______ times  in a minute 

a.  15-18  b.  20-25  c.  10-15  d.  50-60

5.  During exhalation the size of the chest cavity ______ 

a.  Decreases  b.  Increases c.  Remains the same  d.  Get out of the lungs

6.  To which disease is smoking linked ? 

a.  Appendicitis   b.  Cancer  c.  Fever  d.  Anaemia

7.  Name the organism which breathes through its  skin 

a.  Cat  b.  Human beings c.  Dog  d.  Earthworm

8.  The small openings in the body of a cockroach are called ( ) 

a.  Holes  b.  Spiracles   c.  Tracks  d.  Pores

9.  Name the organism that breathes through its lungs as well as its skin ( )

a.  Human being  b.  Frog   c.  Dog  d.  Earthworm 

10. The air tubes that an insect has are useful for the exchange of________( )

a.  Gases  b.  Liquids   c.  Solid s   d.  No exchange

11. In cockroaches, air enters the body through  ____________( )

a.  Lungs  b.  Gills c.  Spiracles d.  Skin

12. During heavy exercise, we get cramps in the legs due to the accumulation of ( )

a.  Carbon dioxide  b.  Lactic acid  c.  Alcohol  d.  water

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