biology MCQs - 10th class Chapter 01 Mcqs

1

The process where C-H bonds in food are broken to release energy is called?

A

Gaseous exchange

B

Breathing

C

Cellular respiration

D

Photosynthesis

2

In plants, the main sites for gaseous exchange in leaves are the?

A

Cuticle

B

Stomata

C

Lenticels

D

Bark

3

Pores in the bark of woody stems that allow air to pass through are called?

A

Stomata

B

Guard cells

C

Cuticle

D

Lenticels

4

The human air passageway begins with the?

A

Pharynx

B

Larynx

C

Nasal cavity

D

Trachea

5

What structure is also known as the voice box?

A

Pharynx

B

Larynx

C

Trachea

D

Bronchus

6

The trachea is kept from collapsing by C-shaped rings made of what?

A

Bone

B

Muscle

C

Cartilage

D

Fibrous tissue

7

The trachea divides into two smaller tubes called?

A

Bronchioles

B

Alveolar ducts

C

Bronchi

D

Larynx

8

The respiratory surface in the human body is formed by the?

A

Bronchioles

B

Trachea

C

Lungs

D

Alveoli

9

Each lung is enclosed by two membranes known as the?

A

Diaphragm

B

Intercoastal membranes

C

Pleural membranes

D

Pericardial membranes

10

What is the thick muscular structure present below the lungs?

A

Rib cage

B

Diaphragm

C

Stomach

D

Sternum

11

During inhalation, the rib muscles contract and the ribs are?

A

Lowered

B

Raised

C

Kept stationary

D

Pushed inward

12

What is the normal breathing rate for humans at rest per minute?

A

10-12

B

30-40

C

16-20

D

25-30

13

The breathing rate during hard exercise can increase up to how many times per minute?

A

20-25

B

25-30

C

30-40

D

50-60

14

The respiratory centre that controls breathing is located in the?

A

Lungs

B

Heart

C

Spinal cord

D

Brain

15

What is the percentage of oxygen in inspired air?

A

16%

B

4%

C

79%

D

21%

16

What is the percentage of carbon dioxide in expired air?

A

0.04%

B

16%

C

4%

D

21%

17

Which substance is used in an experiment to show that exhaled air contains carbon dioxide?

A

Methylene blue

B

Water

C

Limewater

D

Alcohol

18

Inflammation of the bronchi or bronchioles is known as?

A

Emphysema

B

Bronchitis

C

Asthma

D

Pneumonia

19

Which type of bronchitis typically lasts for about two weeks?

A

Chronic bronchitis

B

Severe bronchitis

C

Acute bronchitis

D

Mild bronchitis

20

The destruction of the walls of the alveoli is a condition called?

A

Asthma

B

Pneumonia

C

Bronchitis

D

Emphysema

21

By the time symptoms of emphysema appear, a patient may have lost what percentage of lung tissue?

A

10-20%

B

25-40%

C

50-70%

D

80-90%

22

An infection of the lungs, often caused by the bacterium Streptococcus pneumoniae, is called?

A

Pneumonia

B

Bronchitis

C

Lung cancer

D

Asthma

23

If a lung infection affects both lungs, it is called?

A

Chronic pneumonia

B

Double pneumonia

C

Acute pneumonia

D

Severe pneumonia

24

Which respiratory disorder is a form of allergy causing inflammation and narrowing of the airways?

A

Emphysema

B

Pneumonia

C

Asthma

D

Bronchitis

25

In asthma patients, airways become sensitive to allergy-causing factors called?

A

Pathogens

B

Carcinogens

C

Allergens

D

Mutagens

26

A disease characterized by uncontrolled cell division in the lung tissues is?

A

Emphysema

B

Tuberculosis

C

Lung cancer

D

Pneumonia

27

According to the text, what is the main cause of lung cancer?

A

Viral infections

B

Smoking

C

Ionizing radiation

D

Air pollution

28

Cigarette smoke contains over how many known carcinogens?

A

20

B

30

C

40

D

50

29

The inhalation of smoke from another's smoking is called?

A

Active smoking

B

Primary smoking

C

Passive smoking

D

Secondary smoking

30

Tobacco smoke contains over how many different chemicals?

A

1,000

B

2,000

C

3,000

D

4,000

31

Which chemical in tobacco smoke is a powerful poison once used as an insecticide?

A

Tar

B

Carbon monoxide

C

Nicotine

D

Benzene

32

Carbon monoxide in tobacco smoke lessens the oxygen-carrying capacity of what?

A

Platelets

B

White blood cells

C

Plasma

D

Haemoglobin

33

Smoking increases the risk of tuberculosis by how many times?

A

Two to four times

B

Five to six times

C

Seven to eight times

D

Ten times

34

Non-smokers exposed to passive smoke increase their lung cancer risk by?

A

5-10%

B

10-15%

C

20-30%

D

40-50%

35

The World No Tobacco Day is celebrated on?

A

31st March

B

31st May

C

30th June

D

31st December

36

What happens to the diaphragm during exhalation?

A

It contracts and is lowered

B

It relaxes and gets its raised dome shape

C

It remains flat

D

It contracts and moves up

37

In young stems, some gaseous exchange occurs through the?

A

Bark

B

Lenticels

C

Stomata

D

Cuticle

38

Which parts of the air passageway are lined with fine hairs and mucous?

A

Larynx

B

Trachea

C

Bronchioles

D

Nasal cavity

39

The function of mucous in the nasal cavity is to?

A

Produce sound

B

Filter, moisten, and warm the air

C

Exchange gases

D

Contract the airway

40

The narrow opening at the floor of the pharynx that leads into the larynx is the?

A

Epiglottis

B

Glottis

C

Nostril

D

Bronchus

41

Vibrations of what structure produce sounds?

A

Vocal cords

B

Epiglottis

C

Cartilaginous rings

D

Alveoli walls

42

The bronchioles progressively lose what as they become narrower?

A

Cilia

B

Mucus

C

Epithelial cells

D

Cartilages

43

The pulmonary vein carries what type of blood back to the heart?

A

Deoxygenated blood

B

Oxygenated blood

C

Mixed blood

D

Venous blood

44

The chest wall is made up of 12 pairs of ribs and the?

A

Intercoastal muscles

B

Diaphragm muscles

C

Abdominal muscles

D

Pectoral muscles

45

The right lung is bigger and has how many lobes?

A

One

B

Two

C

Three

D

Four

46

The left lung is slightly smaller and has how many lobes?

A

One

B

Two

C

Three

D

Four

47

What is the term for the process through which animals take air into their bodies to get oxygen?

A

Cellular respiration

B

Gaseous exchange

C

Breathing

D

Inhalation

48

In aquatic plants, where do they get oxygen from?

A

Air spaces in stems

B

Stomata on leaves

C

Dissolved in water

D

The soil

49

The trachea and bronchi are lined with ciliated and what other type of cells?

A

Epithelial cells

B

Glandular cells

C

Muscle cells

D

Nerve cells

50

The majority of people diagnosed with chronic bronchitis are of what age?

A

25 years or older

B

35 years or older

C

45 years or older

D

55 years or older