FSC Biology Book MCQs Chapter 13 Class 11

Created on March 02, 2022

Biology Ch 13 Class 11 Gaseous Exchange

1 / 64

A disease caused by gradual breakdown of the thin walls of alveoli is;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tuberculosis

B) Asthma

C) Emphysema

D) Bronchitis

2 / 64

During inspiration, the diaphragm:

PMC Practice 3
Biology
Gaseous Exchange
Elimination Tool:

A) Contracts

B) Relaxes

C) Contracts and relaxes

D) None of these options is correct

3 / 64

Guard cells function as:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) The defense system

B) Multisensory hydraulic valve

C) Hydrostatic pressure

D) All of these

4 / 64

The gas-exchange portion of the human respiratory system is the:

NTS 2016 SMBBMC
Biology
Gaseous Exchange
Elimination Tool:

A) Larynx

B) Trachea

C) Bronchi

D) Alveoli

5 / 64

Lungs are spongy due to the presence of million of

Air sacs

Alveoli

Bronchioles

Parabronchi

6 / 64

The respiratory pigment, which has much higher affinity to combine with oxygen is:

NUMS 2016
Biology
Gaseous Exchange
Elimination Tool:

A) Myoglobin

B) Globin

C) Haemoglobin

D) Hemocyanin

7 / 64

Oxygen is transported by combining with ……….. in Hb.

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Nitrogen

B) Iron

D) Hydrogen

C) Carbon

8 / 64

Lungs are separated from abdominal cavity by a muscular sheath called:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Rib cage

C) Pericardium

D) Diaphragm

9 / 64

Gaseous exchange through the skin is known as ______ respiration.

Cuticular

Cutaneous

Skin

Pulmonary

10 / 64

The irritant substances of smoke cause smoker’s cough which weakened and bursts:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) Bronchi

B) Bronchiole

C) Alveoli

D) Trachea

11 / 64

______ respiration is the process by which cell utilized oxygen and produces CO2

Cellular

Organismic

Both of these

None of these

12 / 64

The glycolate produced diffuses into the membrane bounded organelles called

Glyoxisomes

Peroxisomes

Lysosomes

Mitochondria

13 / 64

In most birds air sacs are _____ in number

10

3

4

9

14 / 64

Booklungs serve the function of respiration in:

NTS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Scorpion

B) Earthworm

C) Frog

D) Cockroaches

15 / 64

As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

16 / 64

Diaphragm is a sheet of:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Smooth muscles

B) Cardiac muscles

C) Skeletal muscles

D) All of these

17 / 64

There are ______ stomata per square cm of leaf surface in Tobacco plants.

1200

12000

100,000

1000

18 / 64

In which of the following are book lungs found?

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Clam warm

B) Spider

C) Silverfish

D) Leech

19 / 64

The oxygen-binding protein present in skeletal muscles is:

NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:

A) Globin

B) Glycogen

C) Myo Glycogen

D) Myoglobin

20 / 64

Vocal cords are stretched across

Larynx

Pharynx

Golttis

None of these

21 / 64

Breathing is considered as a:

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Chemical process

B) Biochemical process

C) Mechanical process

D) Both A and B

22 / 64

Pharynx leads air into _____ through glottis.

NTS 2012
Biology
Gaseous Exchange
Elimination Tool:

A) Trachea

B) Bronchus

C) Alveoli

E) Larynx

23 / 64

Smaller the animals:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) More rate of respiration

B) Less the rate of respiration

C) Rate of respiration has nothing to do with the size of animal

D) None of these

24 / 64

Lungs are covered with double layered thin membranous sac called

Disphragm

Pleura

Pericardium

Rib cage

25 / 64

The blood enters the _____ side of heart

Posterior

All possibl

26 / 64

The function of respiratory passage, Cilia is to keep the airways clear of:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Carbon dioxide

B) Oxygen

C) Dust

D) Carbon Monoxide

27 / 64

Four plants are present in different environmental conditions. Plant A is present in a warm climate with continuous rainfall, plant B is present in a cool forest, plant C is present in a warm climate with little breeze, while plant D is present in a warm climate with high wind speed. Which one of the above plants will have the highest rate of transpiration?

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Plant B

B) Plant D

C) Plant A

D) Plant C

28 / 64

Parabronchi are open at ______ end/s

Single

Both

Do not have opening

None of these

29 / 64

When abdomen expands, the number of spiracles open is

2

3

6

8

30 / 64

Which of the following correctly explains the structure of myoglobin:

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) 4 polypeptide chains + 4 heme portions

B) 4 polypeptide chains + 1 heme portions

C) 1 polypeptide chains + 4 heme portions

D) 1 polypeptide chains + 1 heme portions

31 / 64

Nicotine in tobacco:

NUMS 2014
Biology
Gaseous Exchange
Elimination Tool:

A) Decreases the heart rate

B) Decreases the blood pressure

C) Block the transport or oxygen

D) Paralyzes cells

32 / 64

The number of stomata present per cm2 of leaf is:

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Less than 100

B) 1,000 to 60,000

C) One million

D) None of the above

33 / 64

Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:

NUMS 2019 Reconduct
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Alveoli

C) Chest cage

D) Diaphragm

34 / 64

The voice box leads to the trachea which is also called

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Bronchi

B) Bronchioles

C) Windpipe

D) Alveolar duct

35 / 64

The structural and functional unit of the lungs is:

PMC Practice 2
Biology
Gaseous Exchange
Elimination Tool:

A) Alveoli

B) Trachea

C) Bronchiole

D) Bronchus

36 / 64

Which of the following is not an infection of the lungs/respiratory tract?

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Histoplasmosis

B) Tuberculosis

C) Cystic fibrosis

D) None of the given options

37 / 64

Oxygen, released into the atmosphere, comes from:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) CO2

B) H2O

C) C6H12O6

D) CO2 and H2O

38 / 64

Of the following, which one is better respiratory medium.

Air

Water

Soil

None of these

39 / 64

Active site of Rubisco is evolved to bind

CO2

O2

Both of these

H2O

40 / 64

Hemoglobin can absorb maximum oxygen at sea level, which is _____ ml/100 ml of blood.

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) 15

B) 19

C) 19.6

D) 20

41 / 64

Xerophytes have small thick leaves to;

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Help them float on water

B) Limit water loss, by increasing the surface area

C) Help them survive in salty environment

D) Limit water loss, by reducing the surface area

42 / 64

The infection of lungs is called:

PMC Practice 1
Biology
Gaseous Exchange
Elimination Tool:

A) Emphysema

B) Asthma

C) Pneumonia

D) Bronchitis

43 / 64

The air spaces may comprise upto ______ of total volume of leaf surface.

30%

20%

40%

50%

44 / 64

Oxygen contents per liter of air is

10 ml

100 ml

200 ml

100ml

45 / 64

_________ respiration is directly involved in the production of energy, necessary for all living activities.

Organismic

Cellular

Both of these

None of thes

46 / 64

During breathing air from Pharynx enters to:

UHS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) Trachea

B) Bronchioles

C) Alveoli

D) Bronchi

47 / 64

Haemoglobin carries more oxygen than plasma by:

NTS 2011
Biology
Gaseous Exchange
Elimination Tool:

A) 50 times

B) 20 times

C) 70 times

D) 100 times

48 / 64

Vocal cords, which help in voice production are two thin edged fibrous bands, present in:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Glottis

B) Bronchus

C) Larynx

D) Trachea

49 / 64

Functional units of lungs are called

Alveoli

Air sacs

Parabronchi

None of these

50 / 64

The maximum amount of oxygen which normal human blood absorbs and carries at sea level is how many ml per 100 ml of blood?

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) 10

B) 20

C) 30

D) 40

51 / 64

Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Pleura

B) Alveoli

C) Chest cage

D) Diaphragm

52 / 64

Gaseous exchange in plants takes place through the:

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Stomata

B) Mesophyll

C) Endoderm

D) Xylem

53 / 64

Thick, waxy & leathery cuticle around leaves is present in which of the following?

PMC Sample 2
Biology
Gaseous Exchange
Elimination Tool:

A) Hydrophytes

C) Halophytes

B) Mesophytes

D) Xerophytes

54 / 64

Water is _____ times viscous than air

50

1000

5000

8000

55 / 64

Which of the following is the respiratory surface in human beings?

PMC Practice 3
Biology
Gaseous Exchange
Elimination Tool:

A) Lungs

B) Alveoli

D) Alveolar duct

C) Windpipe

56 / 64

The passageways of the respiratory system mucous secreting cells called:

NTS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) Tracheal cells

B) Goblet cells

C) Surfactant cells

D) Pleural cells

57 / 64

Which one of the following is a genetic disorder in which abnormally thick mucus is produced in the lungs and other parts of the body?

NUMS 2020
Biology
Gaseous Exchange
Elimination Tool:

A) Lung cancer

B) Chronic bronchitis

C) Cystic fibrosis

D) Emphysema

58 / 64

Carbon dioxide is carried in the blood, mainly as:

NUMS 2015
Biology
Gaseous Exchange
Elimination Tool:

A) Sodium bicarbonate

B) Potassium bicarbonate

C) Carbamino-haemoglobin

D) Dissolved gas in plasma

59 / 64

As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:

NUMS 2017
Biology
Gaseous Exchange
Elimination Tool:

A) O2

B) CO2

C) CO

D) H2

60 / 64

The most important cause of many of the respiratory disorders is:

NUMS 2019 Cancelled
Biology
Gaseous Exchange
Elimination Tool:

A) Bacterial infection

B) Pollution

C) Smoking

D) Drinking

61 / 64

Most oxygen is transported in the blood:

NUMS 2018
Biology
Gaseous Exchange
Elimination Tool:

A) In the form of bicarbonate ions.

B) Bound to albumin compounds.

C) Dissolved in the plasma.

E) Bound to hemoglobin.

62 / 64

Number of spiracles present in cockroach is

15

10

20

30

63 / 64

During inspiration, the space inside the chest cavity is increased due to:

UHS 2019
Biology
Gaseous Exchange
Elimination Tool:

A) The relaxation of the muscles of the diaphragm

B) Relaxation of the external intercostal muscles

D) The contraction of the muscles of the diaphragm

C) Increased pressure

64 / 64

Number of spiracles present in the thorax of cockroach is

2

3

5

4

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FSC Biology Book MCQs Chapter 13 Class 11

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