Last Updated on June 6, 2025 by XAM CONTENT
To succeed in Class 11 Biology exams, a strong grasp of Chapter 8 – Cell – The Unit of Life is essential. Our comprehensive collection of chapterwise MCQ questions with answers for Class 11 Biology is designed according to the latest syllabus and exam guidelines, ensuring targeted preparation and better performance. It is a part of MCQ Questions for CBSE Class 11 Biology 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 Cell – The Unit of Life MCQs will strengthen your conceptual clarity.
| Chapter | Cell – The Unit of Life |
| Book | Biology for Class 11 |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 11 |
| Subject | Biology |
| Useful for | Class 11 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 11 Biology Chapterwise MCQ Questions |
MCQ Questions on Cell – The Unit of Life Class 11 Biology (PDF Download)
MCQs
Q1. Which of the following structures is absent in prokaryotic cells?
Nucleus
Ribosomes
Cell wall
Plasma membrane
Show Answer
Answer: Nucleus
Explanation: Prokaryotic cells lack a true nucleus and instead have a nucleoid region.
Q2. Which organelle is responsible for packaging and modifying proteins?
Golgi apparatus
Mitochondria
Ribosome
Lysosome
Show Answer
Answer: Golgi apparatus
Explanation: The Golgi apparatus modifies, sorts, and packages proteins for secretion.
Q3. Which of the following has a double membrane structure?
Mitochondria
Ribosomes
Lysosomes
Peroxisomes
Show Answer
Answer: Mitochondria
Explanation: Mitochondria are double membrane-bound organelles responsible for energy production.
Q4. In eukaryotic cells, DNA is mainly located in:
Nucleus
Cytoplasm
Golgi apparatus
Ribosomes
Show Answer
Answer: Nucleus
Explanation: DNA in eukaryotic cells is confined within the nucleus enclosed by a nuclear envelope.
Q5. Which structure is the site of ribosome synthesis?
Nucleolus
Endoplasmic reticulum
Centrosome
Lysosome
Show Answer
Answer: Nucleolus
Explanation: The nucleolus within the nucleus is responsible for the synthesis of ribosomal RNA.
Q6. The organelle responsible for detoxification of harmful substances is:
Smooth endoplasmic reticulum
Rough endoplasmic reticulum
Golgi apparatus
Lysosome
Show Answer
Answer: Smooth endoplasmic reticulum
Explanation: Smooth ER helps detoxify drugs and harmful chemicals especially in liver cells.
Q7. Which organelle contains its own DNA and ribosomes?
Mitochondria
Lysosome
Golgi body
Peroxisome
Show Answer
Answer: Mitochondria
Explanation: Mitochondria have their own DNA and ribosomes, indicating their evolutionary origin.
Q8. What is the role of lysosomes in a cell?
Intracellular digestion
Energy production
Protein synthesis
DNA replication
Show Answer
Answer: Intracellular digestion
Explanation: Lysosomes contain hydrolytic enzymes that digest unwanted cellular components.
Q9. The plasma membrane is primarily composed of:
Lipids and proteins
Carbohydrates
DNA and RNA
Enzymes
Show Answer
Answer: Lipids and proteins
Explanation: The fluid mosaic model describes the plasma membrane as a lipid bilayer with embedded proteins.
Q10. Which organelle is referred to as the ‘powerhouse of the cell’?
Mitochondria
Golgi body
Nucleus
Endoplasmic reticulum
Show Answer
Answer: Mitochondria
Explanation: Mitochondria generate ATP through cellular respiration and are called the powerhouse of the cell.
Q11. What is the function of centrioles in animal cells?
Spindle formation during cell division
Protein synthesis
DNA replication
ATP production
Show Answer
Answer: Spindle formation during cell division
Explanation: Centrioles help in the formation of spindle fibers required for chromosome separation.
Q12. Which of the following is present in plant cells but absent in animal cells?
Cell wall
Plasma membrane
Mitochondria
Ribosomes
Show Answer
Answer: Cell wall
Explanation: Plant cells have a rigid cell wall made of cellulose which is absent in animal cells.
Q13. Which structure controls the movement of materials into and out of the cell?
Plasma membrane
Cell wall
Nucleus
Golgi body
Show Answer
Answer: Plasma membrane
Explanation: The semi-permeable plasma membrane regulates what enters and exits the cell.
Q14. Which cellular structure is involved in protein synthesis?
Ribosomes
Golgi apparatus
Mitochondria
Lysosomes
Show Answer
Answer: Ribosomes
Explanation: Ribosomes are the site of protein synthesis in both prokaryotic and eukaryotic cells.
Q15. The chromatin in the nucleus is made up of:
DNA and proteins
RNA and enzymes
Lipids and carbohydrates
ATP and amino acids
Show Answer
Answer: DNA and proteins
Explanation: Chromatin is composed of DNA wrapped around histone proteins.
Q16. Which component of the cytoskeleton is responsible for cell shape and movement?
Microfilaments
Ribosomes
Mitochondria
Nucleus
Show Answer
Answer: Microfilaments
Explanation: Microfilaments, made of actin, help maintain cell shape and enable movement.
Q17. Which of the following organelles is involved in the synthesis of lipids?
Smooth ER
Rough ER
Ribosomes
Golgi body
Show Answer
Answer: Smooth ER
Explanation: Smooth endoplasmic reticulum synthesizes lipids and steroids.
Q18. Cristae are found in which organelle?
Mitochondria
Nucleus
Golgi apparatus
Chloroplast
Show Answer
Answer: Mitochondria
Explanation: Cristae are the folds of the inner mitochondrial membrane where ATP synthesis occurs.
Q19. Which of the following is NOT a part of the endomembrane system?
Mitochondria
ER
Golgi complex
Lysosomes
Show Answer
Answer: Mitochondria
Explanation: Mitochondria operate independently and are not part of the endomembrane system.
Q20. The outer membrane of the nucleus is continuous with:
Rough ER
Smooth ER
Golgi body
Mitochondria
Show Answer
Answer: Rough ER
Explanation: The nuclear envelope’s outer membrane is often continuous with the rough endoplasmic reticulum.
We hope the given mcq questions with Answers for Cell – The Unit of Life Class 11 helps you in your learning.
Also check
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Topics from which mcq questions may be asked
- Structure and function of cell organelles
- Prokaryotic and eukaryotic cells
- Plasma membrane
The cell is the basic unit of life that performs all vital functions.
Frequently Asked Questions (FAQs) on Cell – The Unit of Life MCQ Questions
Q1: What is the best way to prepare for Class 11 Biology MCQ questions?
A1: The best way is to study NCERT concepts thoroughly, practice topicwise MCQs regularly. Solving previous year MCQs and mock tests can boost accuracy and speed.
Q2: Are NCERT questions enough for Class 11 Biology MCQ-based exams?
A2: NCERT forms the base for all CBSE Physics MCQs. However, for better preparation, students should solve additional MCQs from reference books and practice HOTS and competency-based questions to develop better understanding.
Q3: Where can I find chapterwise Class 11 Biology MCQ questions with answers?
A3: You can find chapterwise MCQ questions with answers and detailed explanations on trusted educational platforms like xamcontent.com and physicsgurukul.com. These cover both basic and advanced-level questions.
Q4: Do CBSE Class 11 exams include MCQs?
A4: Yes, as per the latest CBSE exam pattern, objective questions, including MCQs, are part of the final exam paper. MCQs test conceptual understanding and application skills.
Q5: How to score high in Class 11 Biology MCQs?
A5: To score high, understand the theory from NCERT, solve a variety of MCQs (basic and conceptual), and regularly revise theory. Avoid guesswork and focus on time management during tests.
