Chapter 5: The Fundamental Unit of Life — Online MCQ Test
SCIENCE · CLASS 9th · Karnataka State Board
Practice Chapter 5: The Fundamental Unit of Life with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers cell discovery cell theory prokaryotic eukaryotic cells plasma membrane cell wall organelles nucleus cytoplasm and cell division..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 5: The Fundamental Unit of Life — Important Questions & Answers
Who discovered the cell in cork cells?
- A. Robert Hooke
- B. Robert Brown
- C. Schleiden
- D. Schwann
Answer: A. Robert Hooke
Robert Hooke observed thin slices of cork and coined the term 'cell'.
Robert Hooke observed thin slices of cork and coined the term 'cell'.
The plasma membrane is also called the:
- A. Cell wall
- B. Cell membrane
- C. Nuclear membrane
- D. Vacuolar membrane
Answer: B. Cell membrane
The plasma membrane is the same as the cell membrane and forms the outer boundary of the cell contents.
The plasma membrane is the same as the cell membrane and forms the outer boundary of the cell contents.
What is the main function of the cell wall in plant cells?
- A. To control cell division
- B. To provide support and protection
- C. To digest food particles
- D. To store hereditary material
Answer: B. To provide support and protection
The cell wall is a rigid outer layer that gives shape, support, and protection to plant cells.
The cell wall is a rigid outer layer that gives shape, support, and protection to plant cells.
Why are red blood cells in humans considered different from onion cells?
- A. RBCs have a cell wall and onion cells do not
- B. RBCs lack a nucleus, while onion cells usually have one
- C. RBCs are prokaryotic, while onion cells are prokaryotic
- D. RBCs contain chloroplasts, while onion cells do not
Answer: B. RBCs lack a nucleus, while onion cells usually have one
Mature human red blood cells do not have a nucleus, but onion cells are eukaryotic and possess a nucleus.
Mature human red blood cells do not have a nucleus, but onion cells are eukaryotic and possess a nucleus.
Which statement about the cell theory is correct?
- A. All cells arise only by spontaneous generation
- B. All living organisms are made of one or more cells
- C. Cells are visible only under a dissecting microscope
- D. Only plant and animal cells are living
Answer: B. All living organisms are made of one or more cells
The cell theory states that all living organisms are composed of cells and the cell is the basic unit of life.
The cell theory states that all living organisms are composed of cells and the cell is the basic unit of life.