Chapter Exam

Chapter 11: Cell Biology — Online MCQ Test

Q: What is the basic structural and functional unit of life?

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.

Q: Which part of the cell is called the control center?

Answer: C. Nucleus — The nucleus controls cell activities and contains hereditary material. It is often called the control center of the cell.

Q: Which cell organelle helps in respiration and energy production?

Answer: A. Mitochondria — Mitochondria carry out cellular respiration and produce energy for the cell. They are essential for life activities.

Q: Which statement is correct when comparing plant and animal cells?

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.

SCIENCE · Samacheer Kalvi 7th · Tamil Nadu State Board

Practice Chapter 11: Cell Biology with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 7th SCIENCE. 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.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Chapter 11: Cell Biology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 7th SCIENCE — Chapter 11: Cell Biology, with answers and explanations. These are sample questions; the exam has its own separate question set.

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.

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.

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.

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.

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.

← Previous Chapter

Chapter 10: Changes Around Us

Next Chapter →

Chapter 12: Basis of Classification