The end products of respiration are:

The process of releasing energy from food is called respiration. Respiration occurs in all the living cells. The process of respiration involves taking in oxygen into the cells, using it for releasing energy by burning food, and then eliminating the waste products carbon dioxide and water from the body.

Consider the following statements and choose the incorrect one(s):

Cockroaches breathe with the help of air tubes called “tracheae”. Cockroach has spiracles on the sides of its body and trachea or air tube throughout inside its body for the process of breathing and respiration.

Which of the following is most likely to have a much higher breathing rate?

The fish lives in water and uses the oxygen dissolved in water for breathing. Since the amount of oxygen dissolved in water is low as compared to the amount of oxygen in air on land, therefore, the rate of breathing is much higher in fish than the land animals like man, dog and sparrow. A higher rate of breathing provides more oxygen to fish from water.

Normal range of breathing rate per minute in an average adult person at rest is:

The number of times a person breathes in one minute is called breathing rate. The average breathing rate in an adult human being at rest is 15 to 18 times per minute. During running, the breathing rate of an adult human being can increase up to 25 per minute or even more.

The mountaineers carry oxygen with them because:

The amount of air available to the person is less than that available on the ground.

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

The fish has special organs of breathing called “gills”. The gills help the fish to use oxygen which is dissolved in water. Gills are projections of the skin. Gills have blood vessels for the exchange of respiratory gases as oxygen and carbon dioxide.

Which of the following organisms can respire anaerobically?

All the organisms which obtain energy by anaerobic respiration can live without the oxygen. Yeast is an organism which can live without oxygen of air because it obtains energy by the process of anaerobic respiration. Those organisms which obtain energy by the process of an aerobic respiration are called anaerobes. Yeast is an anaerobe. It can survive in the absence of oxygen and converts glucose into alcohol. Therefore, it used in wine industry to make alcohol.

Consider the following statements and choose the incorrect one:

The breathing is a physical process while cellular respiration is a bio-chemical process.

Priya is writing some statements, choose the correct statement and help her:

Here, all these statements are correct. Hence, your answer will be option [D].

During the process of exhalation, the ribs move

During exhalation, ribs moves down and inwards, while diaphragm move upwards and relaxes. This reduces the size of the chest cavity and air is pushed out of the lungs.

In a quiz competition, you are asked a question where you have to choose the statement which is/ are incorrect?

The breathing rate in children is higher than that of adults. Children breathe about 20 to 30 times per minute.

Which of the following statement is or are incorrect?

Here, all the statements are correct. Hence your answer will be option [D].

Class 7 Science Chapter 10 MCQ

Class 7 Science Chapter 10 MCQ (Multiple Choice Questions) of Respiration in Organisms updated for academic session 2021-2022. All the objective questions are taken from the latest NCERT Textbooks issued for CBSE Session 2021-22.

Get the complete revision using these important mcq objective questions with answers. The explanation of each answer is also given below each question.

Class 7 Science Chapter 10 MCQ for 2021-2022

Class: 7	Science
Chapter: 10	Respiration in Organisms
Contents:	MCQ Objective Online Test

MCQ Tests with Answers for Class 7 Science Chapter 10

Pick the odd one out from the groups, given below on the basis of respiratory organs:

[A]. Cockroach, grasshopper, ant

[B]. Lizard, cow, snake

[C]. Crocodile, dolphin, fish

[D]. Snake, crow, goat

View Answer

Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. When the breakdown of glucose or food occurs without the use of oxygen, it is called an aerobic respiration.

[B]. When the breakdown of glucose or food occurs with the use of oxygen, it is called aerobic respiration.

[C]. Only a few living organisms carry out anaerobic respiration to obtain energy without using oxygen of air.

[D]. All the above

View Answer

Payel is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payel wants to take help from you:

[A]. Oxygen breaks down glucose outside the cell of organisms.

[B]. Insects have spiracles on the lower surface of the body

[C]. Exhaled air has more percentage of CO2 than inhaled air.

[D]. None of the above

View Answer

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

[A]. Respiration is a kind of slow burning or slow combustion of food at ordinary temperature to produce energy.

[B]. The process of respiration is the similar process as of photosynthesis.

[C]. The process of breakdown of food in the cells of the body with the release of energy is called respiration.

[D]. None of the above

View Answer

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to:

[A]. Take in oxygen from air

[B]. Take in oxygen dissolved in water

[C]. Absorb nutrients present in water

[D]. Reduce waste substance in water

View Answer

Boojho wants to know the difference between aerobic and anaerobic respiration. Paheli told him, as she learnt in the class. Choose the incorrect statement told by her:

[A]. Complete breakdown of food occurs in aerobic respiration whereas partial breakdown of food occurs in anaerobic respiration.

[B]. The end products in anaerobic respiration are carbon dioxide and water whereas the end products in anaerobic respiration may be alcohol and carbon dioxide or lactic acid.

[C]. Aerobic respiration produces a considerable amount of energy whereas much less energy is produced in anaerobic respiration

[D]. None of the above

View Answer

Choose the correct combinations of functions of breathing:

[A]. Provides O2 to the body and breaks down food to release energy

[B]. Breaks down food to release energy and helps the body to get rid of CO2

[C]. Provides O2 to the body and helps the body to get rid of CO2

[D]. Breaks down food to release energy and produces water in the cells

View Answer

Which of the following statement is or are correct?

[A]. Children breathe about 20 to 30 times per minute.

[B]. Whenever a person needs extra energy, he breathes faster than usual.

[C]. We feel hungry after doing a heavy physical exercise or activity.

[D]. All the above.

View Answer

Read the following sentences carefully, and choose the correct one:

[A]. We often sneeze when we inhale air containing dust, smoke or pollen etc.

[B]. Yawning is caused by insufficient oxygen in the body.

[C]. The blood carries oxygen to the all parts of the body, this oxygen is carried by a red pigment called hemoglobin present in the red blood cells.

[D]. All the above

View Answer

Q10

In a science quiz competition, Payel are asked a question where she had to choose the statement which was/were incorrect?

[A]. Dolphin and whales come to the surface of sea water from time to time to breathe in air.

[B]. We cannot survive under water because we have no use to make use of oxygen dissolved in water for breathing.

[C]. Frog is an animal which can breathe through lungs as well as its moist skin.

[D]. Insects have very little haemoglobin, present in their blood to carry out oxygen.

View Answer

Help and Support

Get the help from the NCERT Solutions given at the end of chapter exercise and important questions to prepare for your exams. Now a days MCQ is also a part of question papers in all standard. All the possible MCQs objective questions are given here to help the students in exams. We have tried to cover entire chapter in terms of multiple choice question answers.

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Class 7 Science Chapter 10 MCQ

Class 7 Science Chapter 10 MCQ for 2021-2022

MCQ Tests with Answers for Class 7 Science Chapter 10

Pick the odd one out from the groups, given below on the basis of respiratory organs:

Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

Payel is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payel wants to take help from you:

Badal appeared in class test but he confused to know the incorrect statement. Would you help him to know that?

Fish breathe with the help of gills which are richly supplied with blood vessels. The gills help the fish to:

Boojho wants to know the difference between aerobic and anaerobic respiration. Paheli told him, as she learnt in the class. Choose the incorrect statement told by her:

Choose the correct combinations of functions of breathing:

Which of the following statement is or are correct?

Read the following sentences carefully, and choose the correct one:

In a science quiz competition, Payel are asked a question where she had to choose the statement which was/were incorrect?

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