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.

Sample questions

1. What is the basic unit of life?

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

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