Q. All organisms are made of small microscopic units which cannot be seen with the naked eyes, called
✅ Correct Answer: (B)
cells
Respiration in Organisms MCQs with answers
Dear candidates you will find MCQ questions of 7th Class - Science | Chapter: Respiration in Organisms here. Learn these questions and prepare yourself for coming examinations. You can check the right answer of any question by clicking the option or by clicking view answer button.
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Q. Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
✅ Correct Answer: (D)
lactic acid only
Q. A film of moisture of appears on the surface of the mirror when we
✅ Correct Answer: (B)
exhale
Q. Yeast is used in wine and beer industries because it respires
✅ Correct Answer: (C)
anaerobically producing alcohol
Q. Breathing is a process that
(i) provides O2 to the body.
(ii) breaks down food to release energy.
(iii) helps the body to get rid of CO2
(iv) produces water in the cells.
Which of the following gives the correct combination of functions of breathing?
(i) provides O2 to the body.
(ii) breaks down food to release energy.
(iii) helps the body to get rid of CO2
(iv) produces water in the cells.
Which of the following gives the correct combination of functions of breathing?
✅ Correct Answer: (C)
(i) and (iii)
Q. Name the organ of the body in which the blood is oxygenated.
✅ Correct Answer: (B)
Lungs
Q. After heavy exercise, due to the accumulation of which substance we get muscle cramps ?
✅ Correct Answer: (D)
Lactic acid
Q. The chemical used to test the carbon dioxide gas in exhaled air is
✅ Correct Answer: (A)
Lime water
Q. The mountaineers carry oxygen with them because
✅ Correct Answer: (B)
The amount of air available to a person is less than that available on the ground
Q. The process of breakdown of food in the cell is known as
✅ Correct Answer: (B)
cellular respiration
Q. Lime water turns milky due to the presence of which of the following gases?
✅ Correct Answer: (B)
Carbon dioxide
Q. What is the function of the hair in the nose?
✅ Correct Answer: (B)
To trap dust particles.
Q. Breathing rate in human beings in normal condition is
✅ Correct Answer: (B)
15-18 times in a minute
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