Case study Questions on Class 9 Science Chapter 5 are very important to solve for your exam. Class 9 Science Chapter 5 Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 5 The Fundamental Unit of Life
In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
The Fundamental Unit of Life Case Study Questions With answers
Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 5 The Fundamental Unit of Life
Case Study/Passage-Based Questions
Question 1:
The cell theory, that all plants and animals are composed of cells and that the cell is the basic unit of life, was presented by two biologists, German zoologist Schleiden (1838) and British zoologist Schwann (1839). The cell theory was further expanded by Virchow (1855) by suggesting that all cells arise from pre-existing cells. With the discovery of the electron microscope in 1940, it was possible to observe and understand the complex structure of the cell and its various organelles.
(1) Theodore Schwann was a _____
(a) British zoologist
(b) German zoologist
(c) British botanist
(d) German botanist
Answer: (a) British zoologist
(2) Matthias Schleiden was a _____
(a) German zoologist
(b) British zoologist
(c) German botanist
(d) British botanist
Answer: (a) German zoologist
(3) Which of these scientists formulated the cell theory?
(a) Schleiden and Schwann
(b) Rudolf Virchow
(c) Robert Koch
(d) Antony Von Leeuwenhoek
Answer: (a) Schleiden and Schwann
(4) Which scientist was the first to explain that new cells arise from pre-existing cells?
(a) Antony Von Leeuwenhoek
(b) Matthias Schleiden
(c) Rudolph Virchow
(d) Theodore Schwann
Answer: (c) Rudolph Virchow
(5) Which of these scientists did not contribute to the cell theory?
(a) Robert Koch
(b) Matthias Schleiden
(c) Theodore Schwann
(d) Rudolph Virchow
Answer: (a) Robert Koch
Question 2:
Study the given diagram of the bacterial cells and answer any four questions from (i) to (v).
(i) Label the parts marked 1, 2, and 3.
(a) 1- Nucleus, 2-Cell wall, 3- Plasma membrane.
(b) 1-Cell wall, 2- Nucleoid, 3- Plasma membrane.
(c) 1- Cytoplasm,2- Nucleus, 3- Cell wall.
(d) 1- Nucleus, 2-Cytoplasm, 3- Cell wall.
Answer: (b) 1-Cell wall, 2- Nucleoid, 3- Plasma membrane.
(ii) Which structure is present in region 2 of a living cell bear genes?
(a) Chromosome
(b) Plasma membrane
(c) Cytoplasm
(d) Cell wall
Answer: (a) Chromosome
(iii) How nuclear region of a bacterial cell and the nuclear region of an animal cell is different from each other?
(a) Nuclear region of bacterial cell is well defined but lacks any covering while nuclear region of an animal cell is poorly defined and membrane bound.
(b) Nuclear region of bacterial cell is poorly defined and has a covering while nuclear region of an animal cell is poorly defined and membrane bound.
(c) Nuclear region of bacterial cell is poorly defined and lacks any covering while nuclear region of an animal cell is well defined and membrane bound.
(d) Nuclear region of bacterial cell is poorly defined and lack any covering while nuclear region of an animal cell is well defined and membrane bound.
Answer: (c) Nuclear region of bacterial cell is poorly defined and lack any covering while nuclear region of an animal cell is well defined and membrane bound.
(iv) Which of the following statement is correct?
(a) A single cell cannot perform all the life processes independently.
(b) A single cell can perform all the life processes independently.
(c) A single bacterial cell always needs another cell to carry out the life processes.
(d) A bacterium is a multicellular organism.
Answer: (b) A single cell can perform all the life processes independently.
(v) An example of single-celled organism is :
(a) Bird
(b) Fish
(c) Snake
(d) Amoeba
Answer: (d) Amoeba
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