Chapter 11: Cell Biology — Online MCQ Test
SCIENCE · Samacheer Kalvi 7th · Tamil Nadu State Board
Practice Chapter 11: Cell Biology with a free chapter-wise online MCQ test.
This chapter covers: Cell nucleus mitochondria organelles Structure and functions of cells organelles and cell theory.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 11: Cell Biology — Important Questions & Answers
What is the basic structural and functional unit of life?
- A. Tissue
- B. Cell
- C. Organ
- D. Organ system
Answer: B. Cell
A cell is the smallest unit that can perform all life processes. All living organisms are made up of one or more cells.
A cell is the smallest unit that can perform all life processes. All living organisms are made up of one or more cells.
Which part of the cell is called the control center?
- A. Vacuole
- B. Cytoplasm
- C. Nucleus
- D. Cell wall
Answer: C. Nucleus
The nucleus controls cell activities and contains hereditary material. It is often called the control center of the cell.
The nucleus controls cell activities and contains hereditary material. It is often called the control center of the cell.
Which cell organelle helps in respiration and energy production?
- A. Mitochondria
- B. Vacuole
- C. Cell wall
- D. Nucleus
Answer: A. Mitochondria
Mitochondria carry out cellular respiration and produce energy for the cell. They are essential for life activities.
Mitochondria carry out cellular respiration and produce energy for the cell. They are essential for life activities.
Which statement is correct when comparing plant and animal cells?
- A. Both have a cell wall
- B. Both have chloroplasts
- C. Only plant cells have a cell wall
- D. Only animal cells have a nucleus
Answer: C. Only plant cells have a cell wall
A cell wall is present in plant cells but absent in animal cells. Both plant and animal cells have a nucleus and cell membrane.
A cell wall is present in plant cells but absent in animal cells. Both plant and animal cells have a nucleus and cell membrane.
Which of the following is the best reason mitochondria are called the powerhouse of the cell?
- A. They store water for the cell
- B. They produce energy needed for cellular activities
- C. They protect the cell from outside damage
- D. They control the entry of materials into the cell
Answer: B. They produce energy needed for cellular activities
Mitochondria release energy from food through respiration. This energy is used by the cell for all its activities.
Mitochondria release energy from food through respiration. This energy is used by the cell for all its activities.