Chapter Exam

Chapter-5 Cell Biology — Online MCQ Test

Q: Which part of the cell controls all the activities of the cell?

Answer: B. Nucleus — The nucleus is known as the control center of the cell because it regulates all cell activities and contains genetic material.

Q: The tiny structures present inside a cell and each having a specific function are called ______.

Answer: C. Organelles — Organelles are specialized parts of the cell that perform particular functions, such as mitochondria and ribosomes.

Q: Which cell organelle helps in packaging and secretion of materials?

Answer: A. Golgi apparatus — The Golgi apparatus modifies, packages, and secretes substances made by the cell.

Q: Which statement is NOT correct about the nucleus?

Answer: D. It produces energy for the cell — Energy production is the function of mitochondria, not the nucleus.

SCIENCE · Samacheer Kalvi 9th · Tamil Nadu State Board

Practice Chapter-5 Cell Biology with a free chapter-wise online MCQ test for Tamil Nadu State Board Samacheer Kalvi 9th SCIENCE. This chapter covers: Description Introduces cell structure organelles and the process of cell division Keywords Cell Nucleus Mitochondria Organelles Cell Division. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-5 Cell Biology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board Samacheer Kalvi 9th SCIENCE — Chapter-5 Cell Biology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which part of the cell controls all the activities of the cell?

A. Cell membrane
B. Nucleus ✓
C. Cytoplasm
D. Vacuole

Answer: B. Nucleus
The nucleus is known as the control center of the cell because it regulates all cell activities and contains genetic material.

The tiny structures present inside a cell and each having a specific function are called ______.

A. Tissues
B. Organs
C. Organelles ✓
D. Membranes

Answer: C. Organelles
Organelles are specialized parts of the cell that perform particular functions, such as mitochondria and ribosomes.

Which cell organelle helps in packaging and secretion of materials?

A. Golgi apparatus ✓
B. Ribosome
C. Nucleus
D. Vacuole

Answer: A. Golgi apparatus
The Golgi apparatus modifies, packages, and secretes substances made by the cell.

Which statement is NOT correct about the nucleus?

A. It contains chromatin material
B. It controls cell activities
C. It is surrounded by a nuclear membrane
D. It produces energy for the cell ✓

Answer: D. It produces energy for the cell
Energy production is the function of mitochondria, not the nucleus.

Which option best explains why meiosis is different from mitosis?

A. Meiosis produces identical body cells for repair
B. Meiosis reduces chromosome number and forms gametes ✓
C. Meiosis occurs only in root cells
D. Meiosis does not involve chromosomes

Answer: B. Meiosis reduces chromosome number and forms gametes
Meiosis is a special cell division that produces gametes with half the chromosome number, unlike mitosis which forms identical body cells.

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