Biology Grade 10 MCQs Chapter 10

Welcome to the multiple-choice questions from Chapter 10. This section covers important concepts such as the respiratory system, water cycle, photosynthesis, circulatory system, and more. Each question is designed to test your understanding of key topics. The correct answers are provided below each question to help reinforce learning. Good luck!

Chapter 10 - Multiple Choice Questions

1. What are the main parts of the respiratory system?

Ⓐ Heart, lungs, brain Ⓑ Nose, lungs, diaphragm Ⓒ Nasal cavity, pharynx, trachea, bronchi, lungs, alveoli Ⓓ Esophagus, lungs, stomach

✔ Correct Answer: Ⓒ Nasal cavity, pharynx, trachea, bronchi, lungs, alveoli

2. What is the function of the nasal cavity?

Ⓐ To pump blood Ⓑ To filter dust and regulate air temperature Ⓒ To digest food Ⓓ To store oxygen

✔ Correct Answer: Ⓑ To filter dust and regulate air temperature

3. What is the trachea also called?

Ⓐ Food pipe Ⓑ Windpipe Ⓒ Voice box Ⓓ Blood vessel

✔ Correct Answer: Ⓑ Windpipe

4. What happens during gas exchange in the alveoli?

Ⓐ Oxygen moves into the blood, and carbon dioxide moves out Ⓑ Blood is stored in the alveoli Ⓒ Carbon dioxide is absorbed into the lungs Ⓓ Water is filtered from the air

✔ Correct Answer: Ⓐ Oxygen moves into the blood, and carbon dioxide moves out

5. What is the water cycle?

Ⓐ The movement of air in the lungs Ⓑ The continuous process of water movement on Earth Ⓒ The process of breathing Ⓓ The cycle of plant growth

✔ Correct Answer: Ⓑ The continuous process of water movement on Earth

6. What is precipitation in the water cycle?

Ⓐ The falling of water as rain, snow, or hail Ⓑ The rising of water vapor Ⓒ The collection of groundwater Ⓓ The movement of rivers

✔ Correct Answer: Ⓐ The falling of water as rain, snow, or hail

7. What is the function of a microscope?

Ⓐ To heat substances Ⓑ To magnify small objects Ⓒ To measure liquids Ⓓ To mix chemicals

✔ Correct Answer: Ⓑ To magnify small objects

8. What are the two main parts of a compound microscope?

Ⓐ Lens and mirror Ⓑ Objective lens and eyepiece lens Ⓒ Handle and stand Ⓓ Bulb and glass

✔ Correct Answer: Ⓑ Objective lens and eyepiece lens

9. How does a compound microscope work?

Ⓐ By passing sound waves through an object Ⓑ By using magnets to enlarge objects Ⓒ By passing light through a specimen to create a magnified image Ⓓ By using heat to expand objects

✔ Correct Answer: Ⓒ By passing light through a specimen to create a magnified image

10. What is infiltration in the water cycle?

Ⓐ Water entering the ground Ⓑ Water forming clouds Ⓒ Water running off the surface Ⓓ Water freezing

✔ Correct Answer: Ⓐ Water entering the ground

11. What is a limitation of a compound microscope?

Ⓐ It can only magnify up to 10 times Ⓑ It cannot be used for biological research Ⓒ It has a resolution limit due to the wavelength of light Ⓓ It cannot be used to view living cells

✔ Correct Answer: Ⓒ It has a resolution limit due to the wavelength of light

12. In which fields are compound microscopes commonly used?

Ⓐ Biology and medicine Ⓑ Astronomy and physics Ⓒ Architecture and engineering Ⓓ Sports and entertainment

✔ Correct Answer: Ⓐ Biology and medicine

13. What is the difference between a compound microscope and an electron microscope?

Ⓐ Compound microscopes use light, while electron microscopes use a beam of electrons Ⓑ Electron microscopes are smaller than compound microscopes Ⓒ Both work the same way Ⓓ Compound microscopes are used to magnify atoms

✔ Correct Answer: Ⓐ Compound microscopes use light, while electron microscopes use a beam of electrons

14. How does resolution relate to magnification in microscopes?

Ⓐ Higher magnification always improves resolution Ⓑ Resolution determines the clarity of magnified images Ⓒ Magnification and resolution are the same Ⓓ Resolution decreases with magnification

✔ Correct Answer: Ⓑ Resolution determines the clarity of magnified images

15. What is a safety precaution when using a microscope?

Ⓐ Looking directly at the light source Ⓑ Handling glass slides carefully Ⓒ Using the microscope in complete darkness Ⓓ Shaking the microscope while in use

✔ Correct Answer: Ⓑ Handling glass slides carefully

16. What is the main function of a leaf?

Ⓐ Water absorption Ⓑ Photosynthesis Ⓒ Seed production Ⓓ Providing structural support

✔ Correct Answer: Ⓑ Photosynthesis

17. Which part of the leaf contains chloroplasts for photosynthesis?

Ⓐ Upper epidermis Ⓑ Palisade mesophyll Ⓒ Lower epidermis Ⓓ Stomata

✔ Correct Answer: Ⓑ Palisade mesophyll

18. What is the function of the stomata in a leaf?

Ⓐ Gas exchange Ⓑ Water storage Ⓒ Protection from insects Ⓓ Absorbing nutrients

✔ Correct Answer: Ⓐ Gas exchange

19. How does the structure of a leaf help its function?

Ⓐ Broad shape maximizes sunlight absorption Ⓑ Thick walls prevent water loss Ⓒ Dark color prevents overheating Ⓓ Small size increases water retention

✔ Correct Answer: Ⓐ Broad shape maximizes sunlight absorption

20. What happens during photosynthesis?

Ⓐ Plants use sunlight to produce glucose and oxygen Ⓑ Plants release carbon dioxide Ⓒ Plants break down glucose Ⓓ Plants convert oxygen into nitrogen

✔ Correct Answer: Ⓐ Plants use sunlight to produce glucose and oxygen

21. What is the role of the heart in the circulatory system?

Ⓐ To digest food Ⓑ To pump blood throughout the body Ⓒ To filter waste Ⓓ To break down oxygen

✔ Correct Answer: Ⓑ To pump blood throughout the body

22. What are the two upper chambers of the heart called?

Ⓐ Ventricles Ⓑ Atria Ⓒ Arteries Ⓓ Valves

✔ Correct Answer: Ⓑ Atria

23. What is the main function of blood?

Ⓐ To store oxygen Ⓑ To transport oxygen, nutrients, and waste Ⓒ To digest food Ⓓ To regulate body temperature

✔ Correct Answer: Ⓑ To transport oxygen, nutrients, and waste

24. What is asthma?

Ⓐ A bacterial infection Ⓑ A lung disease that causes airway inflammation Ⓒ A digestive disorder Ⓓ A circulatory system problem

✔ Correct Answer: Ⓑ A lung disease that causes airway inflammation

25. What is the main cause of lung cancer?

Ⓐ Smoking Ⓑ Lack of exercise Ⓒ Poor diet Ⓓ Low oxygen levels

✔ Correct Answer: Ⓐ Smoking