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Subjects
Science CBSE
Class 7
Respiration in organisms
Breathing and gas exchange
7.
NCERT objective type questions
Exercise condition:
4
m.
Choose the correct answer:
1.
Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
Alcohol and CO2
Alcohol and lactic acid
Lactic acid and CO2
Lactic acid only
2.
Normal range of breathing rate per minute in an average adult person at rest is
21-24
15-18
30-33
9-12
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