Respiration in Organisms Test

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Respiration in Organisms Test - 4

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Question 1
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Directions For Questions

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Directions: Look at the given diagram carefully and answer the question.

Which of the following statements is incorrect about A?

A
A is well supplied with blood vessels.

B
A is the site for diffusion.

C
A are projections of skin.

D
A is used by fish to drink water.

Solution

A are gills. Gills are used by fish in respiration and not for drinking water.
Question 2
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Complete the following reaction:

Glucose ________ + Energy

A
Ethyl alcohol

B
Oxygen

C
Lactic acid

D
Carbon dioxide

Solution

While doing exercise, we feel cramps in muscles due to the formation of lactic acid. At that time, due to the increased energy needs of the body, our muscle cells undergo anaerobic respiration and give out lactic acid and energy.

Question 3

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The following table enlists the differences between breathing and respiration. Which of the following differences are incorrect?

Breathing	Respiration
(i) It is a physical process.	It is a chemical process.
(ii) It is simply the exchange of gases.	It is the burning of food in the presence of O₂ and gives out CO₂.
(iii) It occurs at the cellular level.	It occurs at the organ level.
(iv) It is called internal respiration.	It is called external respiration.
(v) It occurs in animals only.	It occurs in all living beings including plants.

(i) and (ii) only

(ii) and (iii) only

(iii) and (iv) only

(iv) and (v) only

Solution

Respiration occurs at the cellular level. Breathing occurs at the organ level.
Breathing is external respiration. Respiration is also known as internal respiration.

Question 4
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Why is aerobic respiration more advantageous than anaerobic respiration?

A
Because it requires oxygen

B
Because it produces more energy

C
Because it causes the complete breakdown of respiratory substrate

D
Because it produces water

Solution

Aerobic respiration produces far more energy than anaerobic respiration. This is the reason it is more advantageous.

Question 5

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During the process of inhalation, changes occur in the diaphragm and rib cage. Which of the following is the correct match?

Diaphragm	Rib cage
1. Flattens 2. Contracts 3. Becomes more curved 4. Becomes more curved	Moves down and inwards Moves outwards and upwards Moves down and inwards Moves down and upwards

1

2

3

4 Solution

During the process of inhalation, the diaphragm contracts, and the rib cage moves upwards and outwards.

Question 6
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A student, while setting up the experiment to show that CO₂ is evolved during respiration, committed some errors shown in the figure below:

What changes should be made in the setup to get the desired results?

A
KOH solution should be taken in the small test tube inside the flask and germinating seeds in the beaker.

B
Water should be taken in the beaker and KOH solution in the flask.

C
KOH solution should be taken in the small test tube inside the flask and water should be taken in the beaker.

D
Water should be taken in the flask and KOH solution in the small test tube.

Solution

KOH solution should be taken in the small test tube inside the flask and water should be taken in the beaker.
Question 7
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Directions: Two words related in some way are given and the third word is also given followed by four alternatives. You have to find out which one of the alternatives bears the same relation to the third word as the first and second words do.

Humans : Nostrils : : Whales : _________

A
Spiracles

B
Blowholes

C
Air tubes

D
Lungs

Solution

Humans breathe in air through the nostrils. Whales breathe in through their blowholes.
Question 8
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What will happen to the breathing rate if the CO₂concentration in the blood increases?

A
Increases

B
Decreases

C
Stops

D
Remains unaffected

Solution

Breathing rate will increase if the concentration of carbon dioxide increases. This helps speed up the exhalation of carbon dioxide from the body.
Question 9
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What causes an asthma attack?

A
Microbes accumulation in the airways

B
Forceful inhalation

C
Thickening of airway muscles

D
Lack of oxygen in the atmosphere

Solution

Asthma is a condition in which a person's airways become inflamed, narrow and swollen, and produce extra mucus. Thickening of airway muscles causes an asthma attack.
Question 10
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Read the paragraph given below regarding respiration in plants. A few words have been underlined.

Mostly, plants undergo anaerobic respiration. They exchange gases through stomata by osmosis. At night, no photosynthesis occurs; CO₂is eliminated out through stomata. During the day, CO₂ is used for photosynthesis; hence, there is intake of CO₂ and release of O₂through stomata.

Select the correct option regarding this.

A
Anaerobic should not be replaced as it is correctly mentioned.

B
Osmosis should be replaced by diffusion.

C
Night should be replaced by day and CO₂should be kept as it is.

D
Photosynthesis should be replaced by respiration.

Solution

Exchange of gases occurs through stomata by diffusion.
Question 11
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If oxygen is to inhalation, then carbon dioxide is to

A
excretion

B
respiration

C
circulation

D
exhalation

Solution

Breathing is simply the inhalation of oxygen and exhalation of carbon dioxide, i.e. exchange of gases. So, if oxygen is to inhalation, then carbon dioxide is to exhalation.
Question 12
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Which of the following get(s) trapped in the hair present in our nasal cavity?

A
Carbon dioxide

B
Carbon monoxide

C
Smoke and pollen

D
Oxygen and carbon dioxide

Solution

Air that we breathe in is taken through our nose. The hair present in our nose filter off the germs, pollen, or smoke in the air that we inhale.
Question 13
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It is printed on the cigarette box that ''Smoking is injurious to health'' because

A
smoking increases pulse rate

B
smoking damages our lungs

C
smoking interferes with blood circulation

D
smoking disrupts ion exchange across membranes

Solution

Smoking is injurious to health as it results in inhalation of harmful smoke and gases. These gases enter our lungs and damage them.
Question 14
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Directions For Questions

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Directions: Refer to the given flow chart and choose the incorrect option if A, B, C and D are amoeba, earthworm, plants and fish (in random order).

A
B : Possesses many cells

B
C: Lives in water

C
D: Gives out O₂

D
A: Considered as farmer's friend

Solution

Gaseous exchange in earthworm takes place through moist skin, thus A is earthworm. Earthworm is called farmer's friend as it makes the soil fertile.In B, gaseous exchange takes place by diffusion. Gaseous exchange by diffusion takes place in unicellular organisms like amoeba.
In C, gaseous exchange takes place through projections of skins. These projections are called gills. Gills are possessed by aquatic animals like fish. Aquatic animals are the animals living in water.
In D, gaseous exchange occurs through leaves. Plants have stomata in leaves through which the gaseous exchange takes place. Plants give out O₂ during photosynthesis.
Question 15
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Directions For Questions

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Directions: Refer to the given figure and choose the correct option.

A
A: 21% O₂ and 0.04% CO₂

B
A: 16.4% O₂ and 4.4% CO₂

C
B: 16.4% O₂ and 4.4% CO₂

D
B: 0.04% O₂and 21% CO₂

Solution

A is the percentage of gases in exhaled air. Exhaled air contains 16.4% O₂ and 4.4% CO₂.
Question 16
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Directions: Read the statements given below and choose the right answer.

Assertion (A): No exchange of gases takes place in the roots of the plant.
Reason (R): Roots of the plant do not contain stomata.

A
Both A and R are true and R is the right explanation of A

B
Both A and R are true, but R is not the right explanation of A

C
A is true, but R is false

D
A is false, but R is true

Solution

A is false, but R is true. Exchange of gases takes place in roots too. Roots take up air from the air spaces present between the soil particles by simple diffusion. Roots of the plant do not contain stomata which are present in leaves for exchange of gases.
Question 17
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Directions: Read the following sentences and choose the correct alternative of the following.

A: Breathing rate increases during vigorous exercise.
B: Breathing rate is a measure of number of times a person inhales in a minute.

A
Both the sentences are true

B
Both the sentences are false

C
Sentence A is true, but sentence B is false

D
Sentence A is false, but sentence B is true

Solution

Sentence A is true, but sentence B is false. Breathing rate is number of times a person breathes in a minute. A breath includes both inhalation and exhalation.
Question 18
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Choose the correct sequence of answers for the following sentences:

a. Breathing rate of humans at rest
b. Result of irritation caused by dust particles in the nasal cavity
c. Compound formed when CO₂ is passed through lime water
d. Spaces between the soil particles

A
15-18/min, Sneezing, Calcium carbonate, Air spaces

B
25/min, Coughing, Calcium hydroxide, Soil spaces

C
15-20/min, Coughing, Calcium carbonate, Soil spaces

D
25/min, Sneezing, Calcium hydroxide, Air spaces

Solution

The breathing rate of humans at rest is 15-18/ min.
Irritation caused by dust particles in the nasal cavity results in sneezing.
When CO₂ is passed through lime water, it forms the white precipitate of calcium carbonate.
The spaces present between the soil particles are called air spaces.
Question 19
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Which organ forms the floor of the chest cavity?

A
Lungs

B
Ribs

C
Nasal cavity

D
Diaphragm

Solution

The chest cavity is surrounded by the rib cage, while the floor is occupied by a dome-shaped muscle called diaphragm. Lungs are found in the pleural cavity.
Question 20
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Directions: Arrange the defining terms for the following in correct order.

a. Openings outside body of insects
b. Network of tubes in insects
c. Tube connecting lungs with throat
d. Structure where diffusion occurs with high efficiency

A
Tracheae - Spiracles - Trachea - Alveoli

B
Spiracles - Trachea - Tracheae - Alveoli

C
Spiracles - Tracheae - Trachea - Alveoli

D
Spiracles - Tracheae - Alveoli - Trachea

Solution

The correct sequence of defining terms is as follows.
Spiracles - Tracheae - Trachea - Alveoli.
Spiracles are the openings outside the body of insects.
Tracheae are the network of tubes inside the body of insects.
Trachea is the tube that connects lungs to the throat.
Diffusion occurs in high efficiency in alveoli.

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Respiration in Organisms Test - 4

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Respiration in Organisms Test - 4

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SHARING IS CARING

Question 1

A is well supplied with blood vessels.

A is the site for diffusion.

A are projections of skin.

A is used by fish to drink water.

Solution

Question 2

Ethyl alcohol

Oxygen

Lactic acid

Carbon dioxide

Solution

Question 3

(i) and (ii) only

(ii) and (iii) only

(iii) and (iv) only

(iv) and (v) only

Solution

Question 4

Because it requires oxygen

Because it produces more energy

Because it causes the complete breakdown of respiratory substrate

Because it produces water

Solution

Question 5

1

2

3

4

Solution

Question 6

KOH solution should be taken in the small test tube inside the flask and germinating seeds in the beaker.

Water should be taken in the beaker and KOH solution in the flask.

KOH solution should be taken in the small test tube inside the flask and water should be taken in the beaker.

Water should be taken in the flask and KOH solution in the small test tube.

Solution

Question 7

Spiracles

Blowholes

Air tubes

Lungs

Solution

Question 8

Increases

Decreases

Stops

Remains unaffected

Solution

Question 9

Microbes accumulation in the airways

Forceful inhalation

Thickening of airway muscles

Lack of oxygen in the atmosphere

Solution

Question 10

Anaerobic should not be replaced as it is correctly mentioned.

Osmosis should be replaced by diffusion.

Night should be replaced by day and CO2 should be kept as it is.

Photosynthesis should be replaced by respiration.

Solution

Question 11

excretion

respiration

circulation

exhalation

Solution

Question 12

Carbon dioxide

Carbon monoxide

Smoke and pollen

Oxygen and carbon dioxide

Solution

Night should be replaced by day and CO₂should be kept as it is.

D: Gives out O₂

A: 21% O₂ and 0.04% CO₂

A: 16.4% O₂ and 4.4% CO₂

B: 16.4% O₂ and 4.4% CO₂

B: 0.04% O₂and 21% CO₂