Last Updated on May 15, 2025 by XAM CONTENT
Understanding the key concepts of Class 9 Science Chapter 5 – The Fundamental Unit of Life is crucial for exam success. To make your revision easier, we have created chapterwise mcq questions with Answers for class 9 Science based on the latest syllabus and exam pattern. It is a part of MCQ Questions for CBSE Class 9 Science Series.
These multiple-choice questions will help you assess your knowledge, improve accuracy, and boost confidence for your exams. Whether you are preparing for school tests, online tests or competitive exams, these The Fundamental Unit of Life MCQs will strengthen your conceptual clarity.
| Chapter | The Fundamental Unit of Life |
| Book | Science Textbook for Class 9 |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 9 |
| Subject | Science |
| Useful for | Class 9 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 9 Science Chapterwise MCQ Questions |
MCQ Questions on The Fundamental Unit of Life Class 9 Science
MCQs
Q1. Why is the cell called the basic structural and functional unit of life?
(a) It is visible to naked eye
(b) It has DNA
(c) All organisms are made up of cells and carry out life functions
(d) It is made of organelles
Show Answer
Answer: (c)
Explanation: Cells form the building blocks of organisms and carry out essential life processes like nutrition, respiration, and reproduction.
Q2. Which organelle controls all the activities of the cell?
(a) Mitochondria
(b) Golgi apparatus
(c) Ribosomes
(d) Nucleus
Show Answer
Answer: (d)
Explanation: Nucleus regulates all cellular activities and contains genetic material.
Q3. Which structure in a cell is responsible for selective permeability?
(a) Cell wall
(b) Cytoplasm
(c) Plasma membrane
(d) Nucleus
Show Answer
Answer: (c)
Explanation: Plasma membrane allows only selective materials to enter or leave the cell, making it selectively permeable.
Q4. What would happen if the lysosomes burst inside the cell?
(a) Cell will gain energy
(b) Cell will shrink
(c) Cell will digest itself
(d) Nothing happens
Show Answer
Answer: (c)
Explanation: Lysosomes contain digestive enzymes that can break down cell components, hence called ‘suicide bags’.
Q5. Which organelle is responsible for the synthesis of proteins?
(a) Lysosomes
(b) Ribosomes
(c) Vacuole
(d) Plastids
Show Answer
Answer: (b)
Explanation: Ribosomes are the site of protein synthesis and are found on the rough endoplasmic reticulum or freely in cytoplasm.
Q6. What is the function of mitochondria in a cell?
(a) Photosynthesis
(b) Digestion
(c) Protein synthesis
(d) Energy production
Show Answer
Answer: (d)
Explanation: Mitochondria are known as the powerhouse of the cell and generate energy in the form of ATP.
Q7. What is the main function of the Golgi apparatus?
(a) Photosynthesis
(b) Detoxification
(c) Packaging and transport
(d) Protein synthesis
Show Answer
Answer: (c)
Explanation: Golgi apparatus modifies, stores, and packages proteins and lipids for transport within or outside the cell.
Q8. Which organelle is found only in plant cells and is responsible for photosynthesis?
(a) Mitochondria
(b) Chloroplast
(c) Endoplasmic reticulum
(d) Golgi body
Show Answer
Answer: (b)
Explanation: Chloroplasts contain chlorophyll and carry out photosynthesis in plant cells.
Q9. Which organelle helps in detoxifying drugs and poisons in liver cells?
(a) RER
(b) SER
(c) Lysosomes
(d) Mitochondria
Show Answer
Answer: (b)
Explanation: Smooth endoplasmic reticulum helps detoxify drugs and poisons, especially in liver cells.
Q10. Why do plant cells not burst in hypotonic solutions unlike animal cells?
(a) They lack vacuoles
(b) They have rigid cell walls
(c) They have chloroplasts
(d) They don’t absorb water
Show Answer
Answer: (b)
Explanation: Plant cells have a rigid cell wall that prevents bursting by exerting pressure against water intake.
Q11. Which organelles have their own DNA and ribosomes, allowing them to make some of their own proteins?
(a) Ribosomes and Golgi body
(b) Nucleus and vacuoles
(c) Mitochondria and chloroplasts
(d) Lysosomes and ER
Show Answer
Answer: (c)
Explanation: Mitochondria and chloroplasts contain their own DNA and ribosomes, making them semi-autonomous organelles.
Q12. What is the function of leucoplasts in plant cells?
(a) Photosynthesis
(b) Protein synthesis
(c) Storage of starch, oils, and proteins
(d) Cell division
Show Answer
Answer: (c)
Explanation: Leucoplasts are colourless plastids involved in the storage of food substances like starch, oils, and proteins.
Q13. Why is the inner membrane of mitochondria highly folded?
(a) To store DNA
(b) To increase surface area for ATP production
(c) To absorb nutrients
(d) To connect to nucleus
Show Answer
Answer: (b)
Explanation: The folds (cristae) increase the surface area for chemical reactions involved in ATP generation.
Q14. Which organelle is known as the ‘control center’ of the cell?
(a) Golgi apparatus
(b) Cytoplasm
(c) Nucleus
(d) Cell membrane
Show Answer
Answer: (c)
Explanation: The nucleus controls all cellular processes and carries hereditary material in the form of DNA.
Q15. Which of the following is not found in prokaryotic cells?
(a) Ribosomes
(b) Plasma membrane
(c) Nucleus
(d) Cell wall
Show Answer
Answer: (c)
Explanation: Prokaryotic cells lack a true nucleus and membrane-bound organelles.
Q16. How does a cell membrane differ from a cell wall?
(a) Cell membrane is rigid
(b) Cell wall is selectively permeable
(c) Cell wall provides rigidity; membrane regulates exchange
(d) Both have the same function
Show Answer
Answer: (c)
Explanation: The membrane regulates exchange of substances; the wall provides rigidity and structural support.
Q17. What will happen to an animal cell placed in a hypertonic solution?
(a) Swell
(b) Burst
(c) Shrink
(d) No change
Show Answer
Answer: (c)
Explanation: Water moves out of the cell due to osmosis, causing it to shrink (crenation).
Q18. Why are viruses considered between living and non-living organisms?
(a) They have DNA but no cell wall
(b) They grow outside cells
(c) They replicate only inside host cells
(d) They contain chloroplasts
Show Answer
Answer: (c)
Explanation: Viruses cannot reproduce on their own and show life characteristics only inside living hosts.
Q19. In which organelle are lipids primarily synthesized?
(a) SER
(b) RER
(c) Mitochondria
(d) Golgi apparatus
Show Answer
Answer: (a)
Explanation: Smooth Endoplasmic Reticulum (SER) is responsible for synthesis of lipids.
Q20. Which of the following best defines osmosis?
(a) Movement of solute from low to high concentration
(b) Active transport through proteins
(c) Movement of water through a selectively permeable membrane
(d) Diffusion of oxygen through plasma membrane
Show Answer
Answer: (c)
Explanation: Osmosis is the diffusion of water molecules across a selectively permeable membrane.
We hope the given mcq questions with Answers for The Fundamental Unit of Life Class 9 helps you in your learning.
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Topics from which mcq questions may be asked
- Cell structure
- Cell organelles
- Functions of cell components
Cells are the fundamental units of life – tiny machines that run our body.
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Frequently Asked Questions (FAQs) on The Fundamental Unit of Life MCQ Questions
Q1: What are MCQ questions in Class 9 Science?
A1: MCQ (Multiple Choice Questions) in Class 9 Science are objective-type questions where students choose the correct answer from four options. They test conceptual understanding, application, and reasoning skills.
Q2: Are these Class 9 Science MCQs based on the latest CBSE syllabus?
A2: Yes, all MCQ questions provided are strictly based on the latest CBSE Class 9 Science syllabus and follow the current NCERT textbook.
Q3: Are Class 9 Science MCQ questions useful for board exam preparation?
A3: Yes, practicing MCQ questions helps build strong conceptual understanding and improves performance in school tests, Olympiads, and board-level competency assessments.
Q4: Do these MCQs include answers and explanations?
A4: Absolutely. Each MCQ question includes the correct answer along with a detailed explanation to help students understand the concept behind the question.
Q5: Where can I find the best MCQ questions for Class 9 Science?
A5: You can find high-quality, CBSE-based MCQ questions for Class 9 Science on trusted educational websites like xamcontent.com. These include chapterwise, topicwise, and competency-based questions aligned with the latest syllabus
Q6: Are there any resources available online for students to practice mcq questions on class 9 science chapter 5 “The Fundamental Unit of Life“ for CBSE exams?
A6: Yes, several educational websites offer mcq questions for CBSE students preparing for science examinations. We also offer a collection of mcq questions for all classes and subject on our website. Visit our website to access these questions and enhance your learning experience. for more mcq, you can also visit Physics Gurukul Website.
