O’Level Biology Question and Answers under Respiration

O/LEVEL BIOLOGY REVISION QUESTIONS AND ANSWERS

Topic: Respiration

This Quiz provides you with most of the question under the topic of Respiration with their Answer which are well explained at the end of the Quiz.

1. The breakdown of food in absence of oxygen is called

Anaerobic respiration

Tissue respiration

Aerobic respiration

Gaseous exchange

Question 1 of 43

2. Which of the following pairs make the respiratory gases

Oxygen and carbon dioxide

Nitrogen and oxygen

Carbon monoxide and oxygen

Question 2 of 43

3. In the following organisms air is transported in blood expect:

Man

Fish

Frog

Insect

Question 3 of 43

4. The reason as to why the respiratory surfaces are thin and permeable is to provide

Exchange of gases

Poor ventilation

Reduce distance traveled by gases

Steady supply of gases

Question 4 of 43

5. The respiratory gases in insects are transported by

Fluid cavity

Tracheal system

Blood system

Body cavity

Question 5 of 43

6. Which one of the following materials strengthens the tracheal tubes?

Proteins

Minerals

Chitin

Cellulose

Question 6 of 43

7. Which factors make the tracheoles suitable for gaseous exchange?

They are thin walled and fluid filled

Highly branched and air filled

Thin walled and air filled

Highly branched with many cells

Question 7 of 43

8. The following structures are found on gills expect:

Filaments

Pharynx

Rake’s

Arch

Question 8 of 43

9. The importance of gill teeth on the gills is to;

Connect to the bar

Protect gill filament

Connect the filament

Give shape to the gill

Question 9 of 43

10. Why is the gill filament folded?

Increase surface area

Support the gill bar

Make it strong

Increase blood circulation

Question 10 of 43

11. These events occur during ventilation

i. Pressure of mouth cavity reduce

ii.Inner pressure increases

iii. Floor of mouth is raised

iv. Mouth is opened

Which one occurs during inspiration?

(i) and (iv)

(i) and (ii)

(ii) and (iv)

(i) and (iv)

Question 11 of 43

12. What structures do the newly hatched tadpoles use for gaseous exchange?

Internal gills

Skin

Lungs

External gills

Question 12 of 43

13. Which of the following structure is not used by the adult frog for gaseous exchange

Lungs

Skin

Internal gills

Mouth

Question 13 of 43

14. What is the importance of goblet cells in the nasal passage?

Produce mucus that trap dust and germs

Produce air into the passage

Produce mucus full of germs

Trap dust and germs

Question 14 of 43

15. Why is the tracheal walls lined with rings of cartilage? To

Keep it permanently opened

Allow movement of the neck

Reduce flexibility in the neck

Make it very strong

Question 15 of 43

16. Where do the capillary vessels in the lungs originate

The pulmonary artery

The heart

The body organ

The pulmonary vein

Question 16 of 43

17. Which of the following are the fine branches of the bronchi

Alveolar

Air sacs

Bronchioles

Alveoli

Question 17 of 43

18. These are characteristics of respiratory surfaces:

i. Highly folded

ii. Thin walled

iii. Elastic and spongy

iv. Densely supplied by capillaries

Which one makes the alveolus suitable surfaces for gaseous exchange?

(ii) and (iv)

(ii) and (iii)

(i) and (ii)

(iii) and (iv)

Question 18 of 43

19. Why is respiration known as an active process?

Provides energy

Takes in air

Requires energy

Produces energy

Question 19 of 43

20. Nitrogen does not dissolve into the plasma because:

It competes with carbon dioxide

It is not needed by the body

It plays no part in the chemical reactions

It would interfere with the movement of oxygen

Question 20 of 43

21. Steep diffusion gradient is maintained by the following expect

Failure to absorb nitrogen

Lack of oxygen

Blood flow which constantly replenishment oxygenated blood

Replenishment of air

Question 21 of 43

22. Which one of the following makes a person unconscious?

Too much carbon dioxide in the blood

Lack of carbon dioxide in the brain

Lack of nitrogen in the blood

Little or no oxygen in the brain

Question 22 of 43

23. What initiates and maintains the contraction of the heart muscles

Heart muscles

Brain

Exercises

Hormones

Question 23 of 43

24. Which structures of the blood vessels puts a limit to its expansion?

Thick wall

Elastic fiber

Fibrous tissue

Lumen

Question 24 of 43

25. Which one of the following characteristics does not belong to the arteries?

Small lumen

Thick wall

Fibrous tissue

Large lumen

Question 25 of 43

26. Which structures of the blood vessels puts a limit to its expansion?

Elastic fiber

Thick wall

Fibrous tissue

Lumen

Question 26 of 43

27. The following are characteristics of vessels in the mammalian body:

i. A pulse beat

ii. No valve

iii. Lack muscular walls

iv. Walls are permeable

Which characteristic belongs to capillaries?

. (iiii) and (iv)

(i) and (iii)

(ii) and (iv)

(ii) and (iii)

Question 27 of 43

28. Which one of these vessel carries blood to the heart?

Capillaries

Arteries

Lymphatic

Veins

Question 28 of 43

29. What name is given to the part of blood that moves out of the capillaries?

Blood

Lymph

Plasma

Tissue fluid

Question 29 of 43

30. What name is given to the part of blood that moves out of the capillaries?

Plasma

Tissue fluid

Blood

Lymph

Question 30 of 43

31. The process by which food is broken down to provide energy is called

Excretion

Expiration

Respiration

Nutrition

Question 31 of 43

32. Which of the following products is not produced by anaerobic respiration in plants

Lactic acid

Carbon dioxide

Ethanol

Energy

Question 32 of 43

33. Which of the following reasons makes a plant lacks a breathing mechanism

Staying in plenty of air day and night

Being a very large organism

Making its own food

Having a low energy requirement

Question 33 of 43

34. The opening in roots and stems that allow gaseous exchange is:

Intercellular

Lenticels

Air spaces

Stomata

Question 34 of 43

35. The reactions that produce energy in a cell occur in an organelle called

Starch granule

Nucleus

Mitochondria

Cytoplasm

Question 35 of 43

36. Why is a vacuum flask used in an experiment to show that germinating seeds give out heat?

To prevent heat loss and heat gain

To allow insertion of thermometer

To cut off the supply of moisture

To prevent air from circulating

Question 36 of 43

37. What is the importance of nitrogen in plants? It forms

Mineral salts

Amino acids

Carbohydrates

Fats and oils

Question 37 of 43

38. The mineral that hastens the ripening of fruits is called

Phosphorous

Nitrogen

Potassium

Calcium

Question 38 of 43

39. Deficiency of sulphur in plants causes

Stunted growth

Poor development of leaves

Yellowing of older leaves

Lack of development of branches

Question 39 of 43

40. Which of the following mineral salts is used in the formation of wall cell?

Calcium

Nitrogen

Sulphur

Phosphorous

Question 40 of 43

41. Which of the following pair of mineral are required for formation of chlorophyll?

Phosphorous and magnesium

Calcium and phosphorous

Calcium and iron

Magnesium and iron

Question 41 of 43

42. Which one best describes a whorl type of arrangement of leaves on a stem

Leaves are arranged in a spiral form

Leaves grow at the same node

Leaves occur singly at each node

Very many leaves grow at the same node

Question 42 of 43

43. Which of the following leaf modifications is for reduction of transpiration?

Coloured leaves

Spiny leaves

Fleshly leaves

Leaves with buds

Question 43 of 43

O/LEVEL BIOLOGY REVISION QUESTIONS AND ANSWERS

Topic: Respiration

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