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Online Tests
Biology 10th Class English Medium Chapter 10 Online Test MCQs With Answers
Question # 1
The rate of breathing at rest in human is:
Choose an answer
16-20 times per minute
70-80times per minute
80-100times per minute
10 -20 times per minute
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Question # 2
Lungs are enclosed in a membrane called;
Choose an answer
peritonium
pleural membrane
epidermis pericardium
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Question # 3
Power of speaking is only gifted to:
Choose an answer
Human being
Monkey
Parrot
Crow
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Question # 4
What happens during Exhalation?
Choose an answer
Ribs muscles relax
Diaphragm become dome shaped
Pressure on lungs increased
All of these
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Question # 5
The structural and functional unit of lungs is:
Choose an answer
trachea
pharynx
broncioles
alveolus
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Question # 6
The process of gaseous exchange involves.
Choose an answer
Break down of C-H bounds to yield energy.
Physical movements that take air ain and our of body
Getting oxygen from the air and removing carbon dioxide
Transport of oxygen by the blood to different parts of the body.
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Question # 7
Every year "World Day" is celebrated on:
Choose an answer
31 May
30 May
31 March
21 March
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Question # 8
Percentage of CO
2
in exhaled are during breathing is:
Choose an answer
16%
4%
79%
0.04%
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Question # 9
The primary chemical stimulus for breathing is the concentration of.
Choose an answer
Carbon dioxide in blood.
Oxygen in blood
Carbon oxide in muscles
Oxygen in muscles.
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Question # 10
How many carciogens are present in cigarette smoke?
Choose an answer
40
50
60
70
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Question # 11
Most of the gaseous exchange in a leaf occurs through:
Choose an answer
Stomata
General surface
Cuticle
Lenticels
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Question # 12
In plants, gaseous exchange takes place as:
Choose an answer
CO2 is removed and O2 is absorbed
CO2 is absorbed and O2 is removed
CO2 and O2 both are absorbed
CO2 and O2 both are removed
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