CBSE Class 8 Science The Invisible Living World: Beyond Our Naked Eye (Class 8 NCERT New) Quiz 15

1. After observing cheek cells under a microscope, what shape do they typically appear as?

A Polygon-shaped B Star-shaped C Circular D Spiral-shaped

2. What is the main function of the nucleus in a cell?

A It regulates all activities within the cell. B It provides rigidity to the cell. C It stores waste products. D It helps in photosynthesis.

3. Which structure in plant cells provides rigidity and strength to the plant?

A Cell wall B Nucleus C Mitochondria D Cytoplasm

4. What is the role of chloroplasts in plant cells?

A They help in photosynthesis and make the plant green. B They store waste products. C They regulate cell growth. D They provide strength to the cell.

5. What is the function of the vacuole in plant cells?

A It stores important substances, gets rid of waste, and maintains the shape of the cell. B It helps in photosynthesis. C It produces energy for the cell. D It controls cell division.

6. How do plant and animal cells differ in terms of vacuoles?

A Plant cells have large vacuoles, while animal cells have small or no vacuoles. B Animal cells have large vacuoles, while plant cells have small or no vacuoles. C Both plant and animal cells have large vacuoles. D Neither plant nor animal cells have vacuoles.

7. Why do cells in different organisms vary in shape and structure?

A Because their shape and structure relate to their function. B Because they are all the same size. C Because they all perform the same function. D Because they are only found in plants.

8. Compare the shape of a muscle cell and a nerve cell in humans.

A Muscle cells are spindle-shaped, while nerve cells are long with branches. B Both are round in shape. C Muscle cells are round, while nerve cells are spindle-shaped. D Both are square in shape.

9. Schematic drawing of (a) An animal cell and (b) A plant cell, showing cell wall, cell membrane, nucleus, chloroplast, cytoplasm, vacuole, and mitochondria.

A This diagram shows the parts of animal and plant cells. B This diagram shows the parts of a human heart. C This diagram shows the parts of a leaf. D This diagram shows the parts of a flower.

10. Diagram showing (a) Muscle cell and (b) Nerve cell, representing different types of cells in humans.

A This diagram shows the shape of muscle and nerve cells. B This diagram shows the shape of plant cells. C This diagram shows the shape of bacteria. D This diagram shows the shape of blood cells.