Respiration UPSC Questions

Biology

Respiration MCQ Questions


13.
Why do whales come to the surface of water?
A.
To hunt
B.
To rest
C.
To exhale and inhale air
D.
To mate
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ANSWER :
C. To exhale and inhale air
14.
Which plant part has stomata for gas exchange?
A.
Root
B.
Leaf
C.
Stem
D.
Flower
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ANSWER :
B. Leaf
15.
What is the role of lime water in the breathing experiment?
A.
To trap oxygen
B.
To detect CO₂
C.
To cool the air
D.
To store water
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ANSWER :
B. To detect CO₂
16.
What is one result of anaerobic respiration in yeast?
A.
Lactic acid
B.
Alcohol
C.
Carbon monoxide
D.
Water
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ANSWER :
B. Alcohol
17.
‘RNA interference (RNAi)’ technology has gained popularity in the last few years. Why?
1.It is used in developing gene silencing therapies.
2.It can be used in developing therapies for the treatment of cancer.
3.It can be used to develop hormone replacement therapies.
4.It can be used to produce crop plants that are resistant to viral pathogens.
Select the correct answer using the code given below

UPSC - 2019

A.
1, 2 and 4
B.
2 and 3
C.
1 and 3
D.
1 and 4 only
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ANSWER :
A. 1, 2 and 4
18.
Why do we breathe faster after running?
A.
To cool the body
B.
To excrete waste
C.
To supply more oxygen to cells
D.
To store energy
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ANSWER :
C. To supply more oxygen to cells