Respiration in Organisms Class 7 MCQ Questions With Answers CBSE

Class 7 Science Chapter 10 MCQs Questions With Answers NCERT

Students are advised to practice the NCERT MCQ Questions for Class 7 Science Chapter 10 Respiration in Organisms with Answers Pdf free download is available here. MCQ Questions for Class 7 Science with Answers are prepared as per the Latest Exam Pattern. Students can solve these Respiration in Organisms Class 7 MCQs Questions with Answers and assess their preparation level.

Respiration in Organisms Class 7 MCQ

Solving the Respiration in Organisms Multiple Choice Questions of Class 7 Science Chapter 10 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Respiration in Organisms Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 10 Science Class 7 and cross-check your answers during preparation.

Question 1.
A film of moisture of appears on the surface of the mirror when we:
(a) inhale
(b) exhale
(c) breathe
(d) none of these

Answer

(b) exhale
A film of moisture appears on the surface of the mirror when we exhale.

Question 2.
The vital biological process of organisms is:
(a) inspiration
(b) respiration
(c) transpiration
(d) evaporation

Answer

(b) respiration
The vital biological process of organisms is respiration.

Percent Decrease Calculator – Find Percentage Decrease.

Question 3.
The mountaineers carry oxygen with them because:
(a) At an atitude of more than 5 km there is no air
(b) The amount of air available to a person is less than that available on the ground
(c) The temperature of air is higher than that on the ground
(d) The pressure of air is higher than that on the ground

Answer

(b) The amount of air available to a person is less than that available on the ground
The mountaineers carry oxygen with them because the amount of air available to a person is less than that available on the ground.

Question 4.
We feel hungry after a physical activity because we need:
(a) oxygen
(b) energy
(c) food
(d) none of these

Answer

(b) energy
We feel hungry after a physical activity because we need energy.

Question 5.
A person can hold air in the lungs is:
(a) 50 ml
(b) 5000 ml
(c) 500 ml
(d) 0.5 ml

Answer

Question 6.
The percentage of oxygen in exhaled air is:
(a) 14.4%
(b) 4.4%
(c) 16.4%
(d) 0.04%

Answer

Question 7.
The percentage of oxygen in inhaled air is:
(a) 14.4%
(b) 4.4%
(c) 16.4%
(d) 21%

Answer

(d) 21%
The percentage of oxygen in inhaled air is 21%

Question 8.
The percentage of CO₂ in inhaled air is:
(a) 0.04%
(b) 21%
(c) 16.4%
(d) 4.4%

Answer

(a) 0.04%
The percentage of carbon dioxides in inhaled air is 0.04%

Question 9.
The respiratory organs of human beings are:
(a) lungs and skin
(b) lungs
(c) gills
(d) skin

Answer

(b) lungs
The respiratory organs of human beings are lungs.

Question 10.
The process of respiration leads to the release of energy in:
(a) plants
(b) animals
(c) human beings
(d) all of these

Answer

(a) plants
The process of respiration leads to the release of energy in plants.

Question 11.
The absorb oxygen dissolved in water:
(a) frog
(b) fish
(c) earthworm
(d) butterfly

Answer

(b) fish
The fish absorb oxygen dissolved in water.

Question 12.
The respiratory organ of birds are:
(a) mouth
(b) gills
(c) wet skin
(d) lungs

Answer

(d) lungs
The respiratory organ of birds are lungs.

Question 13.
Air exhaled:
(a) has no moisture
(b) has more amount of oxygen
(c) has moisture
(d) has less amount of carbon dioxide

Answer

Question 14.
After exercise:
(a) respiration rate increases
(b) respiration rate decreases
(c) respiration rate remains same
(d) none of these

Answer

(a) respiration rate increases
After exercise respiration rate increases.

Question 15.
Air enters the lungs when:
(a) diaphragm is lowered
(b) diaphragm is pushed upwards
(c) diaphragm remains at its place
(d) none of these

Answer

(a) diaphragm is lowered
Air enters the lungs when diaphragm is lowered.

Question 16.
Roots take up air from the air spaces present between the:
(a) root hair
(b) soil particles
(c) both (a) and (b)
(d) none of these

Answer

(b) soil particles
Roots take up air from the air spaces present between the soil Particles.

Question 17.
If a potted plant is over watered, the roots will:
(a) grow
(b) die
(c) dry
(d) none of these

Answer

(b) die
If potted plant is over watered, the roots will die.

Question 18.
The rate of exchange of gases in plants is not as fast as in:
(a) animals
(b) insects
(c) birds
(d) human beings

Answer

(a) animals
The rate of exchange of gases in plants is not as fast as in animals.

Question 19.
Insects have small openings on the outside of their bodies. These openings are called:
(a) spiracles
(b) trachea
(c) gills
(d) none of these

Answer

(a) spiracles
Insects have small openings on the outside of their bodies, is called spiracles.

Question 20.
Exchange of gases take place through small openings on the surface of the leaves are called:
(a) spiracles
(b) stomata
(c) trachea
(d) none of these

Answer

(b) stomata
Exchange of gases take place through small openings present on the surface of leaves called stomata.

Question 21.
The process of intake of oxygen and exhalation of carbon dioxide is:
(a) breathing rate
(b) breathing
(c) respiration
(d) none of these

Answer

(b) breathing
The process of intake of oxygen and exhalation of carbon dioxide is breathing.

Question 22.
Ribs move down and inward to decrease space in chess cavity during:
(a) inhalation
(b) exhalation
(c) respiration
(d) transportation

Answer

(b) exhalation
Ribs move down and inwards to decrease space in chest cavity during exhalation.

Question 23.
In Cockroaches air enters the body through:
(a) lungs
(b) gills
(c) spiracles
(d) skin

Answer

Question 24.
During heavy exercise, we get cramps in legs due to accumulation of:
(a) carbon dioxide
(b) lactic acid
(c) alcohol
(d) water

Answer

(b) lactic acid
During heavy exercise, we get cramps in legs due to accumulation of carbon dioxide

Question 25.
Normal range of breathing rate per minute in an average adult person at rest is:
(a) 9-12
(b) 15-18
(c) 21-24
(d) 30-33

Answer

(b) 15-18
Normal breathing rate per minute in an average adult person is 15-18

Question 26.
During exhalation the ribs:
(a) move outwards
(b) move downwards
(c) move upwards
(d) do not move at all

Answer

(b) move downwards
During exhalation, the ribs move downwards.

Question 27.
During inhalation the ribs:
(a) move outwards
(b) move downwards
(c) move upwards
(d) do not move at all

Answer

Question 28.
In fish air enters the body through:
(a) lungs
(b) gills
(c) spiracles
(d) skin

Answer

(b) gills
In fish air enters the body through gills.

Question 29.
Earthworm respires through
(a) lungs
(b) gills
(c) spiracles
(d) skin

Answer

(d) skin
Earthworm respires through skin.

Question 30.
The energy giving process is
(a) respiration
(b) transpiration
(c) evaporation
(d) none of these

Answer

(a) respiration
The energy giving process is respiration.

Question 31.
Which disease is linked to smoking ?
(a) malaria
(b) cholera
(c) typhoid
(d) lung cancer

Answer

(d) lung cancer
Lungs Cancer is linked to smoking.

Question 32.
The air tubes present in insects are:
(a) spiracles
(b) trachea
(c) gills
(d) none of these

Answer

(b) trachea
The air tubes present in insects are trachea

Question 33.
The reason of cramps in legs is:
(a) acetic acid
(b) hydrochloric acid
(c) lactic acid
(d) trachea

Answer

Question 34.
In mammals the respiratory organ is:
(a) gills
(b) spiracles
(c) trachea
(d) lungs

Answer

(d) lungs
In mammals the respitory organ is lungs.

Question 35.
Which one of the following is an anaerobic organism ?
(a) yeast
(b) crow
(c) ant
(d) dog

Answer

(a) yeast
Yeast is anaerobic organism.

Question 36.
The percentage of carbon dioxide in exhaled air is:
(a) 0.4%
(b) 4.4%
(c) 14.4%
(d) 44%

Answer

(b) 4.4%
The percentage of carbon dioxide in exhaled air is 4.4%

Question 37.
The size of chest cavity increases during:
(a) respiration
(b) inhalation
(c) transpiration
(d) none of these

Answer

(b) inhalation
The size of chest cavity increases during inhalation.

Question 38.
Frogs breathe through their skin as well as:
(a) gill
(b) lungs
(c) chest
(d) none of these

Answer

(b) lungs
Frogs breathes through their skin as well as lungs.

Question 39.
The end products of anaerobic respiration are:
(a) ethyl alcohol
(b) carbon dioxide
(c) both (a) and (b)
(d) none of these

Answer

Question 40.
The end products of an aerobic respiration are:
(a) carbon dioxide
(b) water and energy
(c) both (a) and (b)
(d) none of these

Answer

Question 41.
These organisms survive in absence of air are known as:
(a) aerobic
(b) an aerobic
(c) earthworm
(d) none of these

Answer

(b) an aerobic
Those organisms survive in absence of air are known as an aerobic.

Question 42.
Respiration taking place in cells is:
(a) breathing
(b) cellular respiration
(c) transpiration
(d) evaporation

Answer

(b) cellular respiration
Respiration taking place in cells is cellular respiration.

Question 43.
The muscles of legs can be relieved by:
(a) massaging
(b) running
(c) exercising
(d) sleeping

Answer

(a) massaging
The muscles of legs can be relieved by massaging

Question 44.
A large muscular sheet farming the floor of chest cavity is:
(a) ribs
(b) trachea
(c) stomata
(d) diaphragm

Answer

(d) diaphragm
A large muscular sheet farming the floor of chest cavity is called diaphragm.

Question 45.
The size of chest cavity decreases during:
(a) inhalation
(b) breathing
(c) exhalation
(d) respiration

Answer

Question 46.
Which part of nose prevents the passage of smoke dust inside the body:
(a) hair
(b) nosal cavity
(c) nostrils
(d) none of these

Answer

(a) hair
Hair of nose prevents the passage of smoke, dust inside the body.

Match the column A with column B:

Question 1.

Column-A	Column-B
(a) Yeast	(i) Stomata
(b) Diaphragm	(ii) Earthworm
(c) Skin	(iii) Chest cavity
(d) Leaves	(iv) Alcohol

Answer

Column-A	Column-B
(a) Yeast	(iv) Alcohol
(b) Diaphragm	(iii) Chest cavity
(c) Skin	(ii) Earthworm
(d) Leaves	(i) Stomata

Question 2.

Column-A	Column-B
(a) Fish	(i) Spiracles
(b) Frog	(ii) Lungs
(c) human beings	(iii) Lungs and skin
(d) Cockroaches	(iv) Gills

Answer

Column-A	Column-B
(a) Fish	(iv) Gills
(b) Frog	(iii) Lungs and skin
(c) human beings	(ii) Lungs
(d) Cockroaches	(i) Spiracles

Question 3.

Column-A	Column-B
(a) The air tubes of insects	(i) Stomata
(b) Skeletal structures surrounding chest cavity	(ii) Diaphragm
(c) Muscular floor of chest cavity	(iii) Ribs
(d) Tiny pores on the surface of leaf	(iv) Trachea

Answer

Column-A	Column-B
(a) The air tubes of insects	(iv) Trachea
(b) Skeletal structures surrounding chest cavity	(iii) Ribs
(c) Muscular floor of chest cavity	(ii) Diaphragm
(d) Tiny pores on the surface of leaf	(i) Stomata

Question 4.

Column-A	Column-B
(a) An anaerobic organism	(i) Lungs
(b) Small openings on the sides of the body of on insect	(ii) Nostrils
(c) The respiratory organs of human beings	(iii) Spiracles
(d) The openings through which we inhale	(iv) Yeast

Answer

Column-A	Column-B
(a) An anaerobic organism	(iv) Yeast
(b) Small openings on the sides of the body of on insect	(iii) Spiracles
(c) The respiratory organs of human beings	(i) Lungs
(d) The openings through which we inhale	(ii) Nostrils

State the following statements are True or False:
Question 1.
Smoking damages lungs.

Answer

True

Question 2.
During heavy exercise the breathing rate of a person slows down.

Answer

False

Question 3.
Plants carry out photosynthesis only during the day and respiration only at night.

Answer

False

Question 4.
Frogs breathe through their skin as well as lungs.

Answer

True

Question 5.
The fish have lungs for respiration.

Answer

False

Question 6.
The size of chest cavity increases during inhalation.

Answer

False

Question 7.
Air enters the lungs when diaphragm is pushed upwards.

Answer

False

Question 8.
The respiratory organ of earthworm is wet skin.

Answer

True

Question 9.
Air exhaled has moisture.

Answer

True

Question 10.
The respiratory organ of birds is mouth.

Answer

False

Question 11.
The end products of aerobic respiration are carbon dioxide and water.

Answer

True

Question 12.
The fish absorbs oxygen dissolved in water.

Answer

True

Question 13.
Roots takes up air from the air spaces present between the soil.

Answer

True

Question 14.
Breathing is a biochemical process.

Answer

False

Question 15.
Enzymes are involved in respiration.

Answer

True

Question 16.
The ribs upwards during exhalation.

Answer

False

Question 17.
Normal rate of breathing per minute in an average adult person at rest is 15-18.

Answer

True

Question 18.
During heavy exercise, we get cramps in the legs due to the accumulation of alcohol.

Answer

False

Question 19.
In cockroaches, air enters the body through spiracles.

Answer

True

Question 20.
Tracheal system is found in insects.

Answer

True

Question 21.
Yeast is an anaerobic organism.

Answer

True

Question 22.
Cold water bath gives relief from cramps.

Answer

False

Question 23.
Lung is main respiratory organ of mammals i.e. man, dog, elephant etc.

Answer

True

Question 24.
Anaerobic respiration is harmless.

Answer

False

Fill in the blanks:

Question 1.
…………………. is a process of taking oxygen into the cells in order to break down simple food materials.

Answer

Respiration

Question 2.
…………………. is inhaling oxygen and exhaling carbon dioxide.

Answer

Breathing

Question 3.
The process of break down of food in the cell with the release of energy is called ………………….

Answer

cellular respiration

Question 4.
When the process of respiration takes place in the presence of oxygen is called ………………….

Answer

aerobic respiration

Question 5.
When the process of respiration takes place absence of oxygen, it is called ………………….

Answer

anaerobic respiration

Question 6.
…………………. are organism such as yeast that can survive in the absence of air.

Answer

Anaerobic

Question 7.
…………………. are respiratory organs of the fish.

Answer

Gills

Question 8.
Giving out of air rich in carbon dioxide is known as ………………….

Answer

exhalation

Question 9.
The taking in of air rich in oxygen into the body is called ………………….

Answer

inhalation

Question 10.
The number of types a person breathes in a minute is termed as the ………………….

Answer

breathing rate

Question 11.
…………………. is a part of respiration.

Answer

Breathing

Question 13.
Energy is stored in food and gets released during ………………….

Answer

respiration

Question 14.
…………………. is a vital biological process.

Answer

Respiration

Question 15.
Smoking damages ………………….

Answer

lungs

Question 16.
Cramp in legs are due to formation of …………………. acid.

Answer

lactic

Question 17.
…………………. of nose prevents the passage of smoke, dust inside the body.

Answer

Hairs

Hope the information shared regarding the NCERT MCQ Questions for Class 7 Science Chapter 10 Respiration in Organisms with Answers Pdf free download is true and genuine as far as our knowledge is concerned. If you feel any information regarding CBSE Class 7 Science Respiration in Organisms MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly.

Class 7 Science MCQ