Cell Structure Quiz - CBSE Class 9 Science

Free practice quiz: Cell Structure (CBSE Class 9 Science). 20 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This CBSE Class 9 Science practice quiz has 20 multiple-choice questions on Cell Structure, and 20 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. What is the basic unit of life?

   1. Atom
   2. Molecule
   3. Cell
   4. Tissue
   Show answer

   Answer: C. Cell

   The basic unit of life is the cell, which is the smallest structural and functional unit of living organisms.

2. What is cytoplasm?

   1. The outer layer of the cell
   2. The fluid that fills the cell
   3. An organelle
   4. Genetic material
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   Answer: B. The fluid that fills the cell

   Cytoplasm is a jelly-like substance that fills the cell and contains the organelles.

3. Which part of the cell is responsible for regulating transport in and out?

   1. Nucleus
   2. Cell membrane
   3. Ribosome
   4. Chloroplast
   Show answer

   Answer: B. Cell membrane

   The cell membrane controls the movement of substances in and out of the cell, thus regulating the internal environment.

4. How do prokaryotic cells differ from eukaryotic cells?

   1. Prokaryotes have a nucleus; eukaryotes do not
   2. Eukaryotes are smaller than prokaryotes
   3. Prokaryotes lack membrane-bound organelles
   4. Eukaryotes do not have DNA
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   Answer: C. Prokaryotes lack membrane-bound organelles

   Prokaryotic cells do not have membrane-bound organelles, which distinguishes them from eukaryotic cells.

5. What is a key feature of a stem cell?

   1. It has a specific function
   2. It can divide into different cell types
   3. It cannot divide
   4. It has a fixed shape
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   Answer: B. It can divide into different cell types

   Stem cells are unspecialized cells that have the ability to differentiate into various specialized cell types.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Which organelle is known as the powerhouse of the cell?
2. What structure protects the cell from its environment?
3. Which of the following is a function of the nucleus?
4. Which organelle is responsible for protein synthesis?
5. What is the function of the cell wall in plant cells?
6. What is the role of the Golgi apparatus?
7. Which type of cell contains chloroplasts?
8. What is the primary component of the cell membrane?
9. What role do lysosomes play in a cell?
10. What is the function of the endoplasmic reticulum?
11. Which structure is responsible for maintaining the shape of a cell?
12. Which organelle is involved in the detoxification of harmful substances?
13. How is the structure of the plasma membrane described?
14. How can you distinguish between plant and animal cells under a microscope?
15. What is the role of DNA in a cell?

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