Chapter 6: Cell: The Unit of Life — Online MCQ Test
BOTANY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 6: Cell: The Unit of Life with a free chapter-wise online MCQ test.
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....
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Chapter 6: Cell: The Unit of Life — Important Questions & Answers
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.
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.
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.
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.
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.
Bacteria are prokaryotes because their genetic material is not enclosed by a nuclear membrane. Instead, it lies in the nucleoid region.