Table of Contents
- Time Limit: 15 minutes is the time limit to complete the quiz.
- Multiple Choice: Each question have multiple answer choices.
- One Correct Answer: Only one answer choice is correct for each question.
- No Negative Marking: There is no penalty for incorrect answers.
Class 9 Chemistry Chapter 5 The Fundamental Unit Of Life Quiz Questions
Welcome to the quiz on Chapter 5: The Fundamental Unit of Life from your Class 9 Chemistry syllabus. This chapter dives into the fascinating world of cells, the building blocks of all living organisms. Understanding the structure and function of cells is crucial for grasping key biological concepts, and this quiz will help you test your knowledge and reinforce important topics covered in the chapter. Whether it’s about the discovery of cells, the functions of cell organelles, or the cell theory, this quiz is designed to challenge and enhance your understanding. Let’s get started and see how well you know the fundamentals of life!
Class 9 Science Chapter 5 The Fundamental Unit Of Life Quiz 1
Question: Which one of the following is the principal structural element of the cytoskeleton?
- A) Microtubules
- B) Actin filaments
- C) Intermediate filaments
- D) All of the above
Answer:
Correct Option is C
Carbon is the principle structural element of a living cell.
Question: Who proposed the principle that all cells arise from pre-existing cells?
- A) Schleiden
- B) Schwann
- C) Virchow
- D) Pasteur
Answer:
C
The principle that all cells arise from pre-existing cells was proposed by Rudolf Virchow in 1855. This principle, also known as the “Cell Proliferation” principle, builds upon the earlier cell theory stating that all living organisms are made up of cells and that the cell is the basic unit of life. The cell proliferation principle adds that new cells are formed by the division and differentiation of pre-existing cells. This principle was a significant contribution to the cell theory and is considered one of the cornerstones of modern cell biology.
Question: Which of the following instruments is used to view the surface of a cell?
- A) Light microscope
- B) Electron microscope
- C) Phase contrast microscope
- D) Scanning electron microscope
Answer:
D
A compound microscope is an instrument that is used to view magnified images of small specimens on a glass slide. Since it uses more than one lens, it is sometimes called the compound microscope.
Question: Cell theory was proposed by ________.
- A) Schleiden and Schwann
- B) Watson and Crick
- C) Darwin and Wallace
- D) Mendel and Morgan
Answer:
Correct option is C
- Cell theory was proposed by a German botanist, Matthias Schleiden and English zoologist, Theodor Schwann in the year 1839.
- The cell theory states that
1) All living things are made up of cells.
2) The cell is the basic structural and functional unit of life.
3) All cells arise from pre-existing cells.
Question: A living cell can be best studied by means of ________.
- A) Electron microscope
- B) Compound microscope
- C) Phase contrast microscope
- D) Fluorescence microscope
Answer:
C
A living cell can be best studied by means of an Electron microscope.
Question: Triple helical structure of collagen was discovered by?
- A) Watson
- B) Crick
- C) Pauling
- D) Ramachandran
Answer:
D
Triple helical structure or collagen was given by G.N. Ramachandran.
Question: What is the main function of the cytoplasm in a cell?
- A) Control cell activities
- B) Store energy
- C) Transport genetic material
- D) Support and suspend organelles
Answer:
D
The cytoplasm is the gel-like substance that fills the cell and contains all the cell’s organelles and structures. The main function of the cytoplasm is to provide a medium for chemical reactions, maintain the cell’s shape, and facilitate the movement of materials and organelles within the cell. It also contains a cytoskeleton that provides structural support to the cell and helps in cell movement. While the cytoplasm does play a role in some metabolic processes, it is not primarily responsible for energy production or the control of cell growth.
Question: Is it true that prokaryotic cells are larger and more complex than eukaryotic cells?
- A) True
- B) False
Answer:
B
Eukaryotic cells are generally larger and more complex than prokaryotic cells. Eukaryotic cells have a defined nucleus and membrane-bound organelles, while prokaryotic cells lack a defined nucleus and membrane-bound organelles. Prokaryotic cells are typically smaller and simpler in structure than eukaryotic cells. This fundamental difference in cell structure is one of the main distinctions between the two types of cells.
