Chapter Exam

Chapter 6: Cell: The Unit of Life — Online MCQ Test

Q: Which of the following is considered the basic structural and functional unit of life?

Answer: B. Cell — The cell is the smallest unit capable of carrying out all life processes. Hence, it is called the basic structural and functional unit of life.

Q: Who proposed the cell theory?

Answer: A. Schleiden and Schwann — Schleiden and Schwann proposed the cell theory, stating that all living organisms are made of cells and the cell is the basic unit of life.

Q: Which of the following is the main function of mitochondria?

Answer: B. ATP production — Mitochondria are the sites of cellular respiration and are known as the powerhouses of the cell because they produce ATP.

Q: A plant cell placed in a hypertonic solution will

Answer: C. Undergo plasmolysis — In a hypertonic solution, water moves out of the plant cell by exosmosis, causing the protoplast to shrink away from the cell wall. This is called plasmolysis.

Q: Which of the following is the best explanation for why bacteria are called prokaryotes?

Answer: C. They lack a membrane-bound nucleus — Bacteria are prokaryotes because their genetic material is not enclosed by a nuclear membrane. Instead, it lies in the nucleoid region.

BOTANY · CLASS 11th · Tamil Nadu State Board

Practice Chapter 6: Cell: The Unit of Life with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 11th BOTANY. This chapter covers: Diving into cell biology this chapter details prokaryotic and eukaryotic cell structures organelle functions and membrane models. Students examine cell walls nucleus chloroplasts m.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 6: Cell: The Unit of Life — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 11th BOTANY — Chapter 6: Cell: The Unit of Life, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is considered the basic structural and functional unit of life?

A. Tissue
B. Cell ✓
C. Organ
D. Organelle

Answer: B. Cell
The cell is the smallest unit capable of carrying out all life processes. Hence, it is called the basic structural and functional unit of life.

Who proposed the cell theory?

A. Schleiden and Schwann ✓
B. Darwin and Wallace
C. Mendel and Morgan
D. Watson and Crick

Answer: A. Schleiden and Schwann
Schleiden and Schwann proposed the cell theory, stating that all living organisms are made of cells and the cell is the basic unit of life.

Which of the following is the main function of mitochondria?

A. Protein synthesis
B. ATP production ✓
C. Storage of water
D. Photosynthesis

Answer: B. ATP production
Mitochondria are the sites of cellular respiration and are known as the powerhouses of the cell because they produce ATP.

A plant cell placed in a hypertonic solution will

A. Burst due to endosmosis
B. Become turgid
C. Undergo plasmolysis ✓
D. Show no change in shape

Answer: C. Undergo plasmolysis
In a hypertonic solution, water moves out of the plant cell by exosmosis, causing the protoplast to shrink away from the cell wall. This is called plasmolysis.

Which of the following is the best explanation for why bacteria are called prokaryotes?

A. They do not have a cell wall
B. Their genetic material is enclosed in a true nucleus
C. They lack a membrane-bound nucleus ✓
D. They contain membrane-bound chloroplasts

Answer: C. They lack a membrane-bound nucleus
Bacteria are prokaryotes because their genetic material is not enclosed by a nuclear membrane. Instead, it lies in the nucleoid region.