Title Cell and Its Structure – Class 11 Biology MCQs with Answers | Important Objective Questions
Introduction: Cell and Its Structure Class 11 Biology MCQs with Answers
The cell is the fundamental structural and functional unit of life. Understanding the structure and functions of the cell is essential for students of Class 11 and 12. In this post, we provide 40 important multiple-choice questions (MCQs) on “Cell and Its Structure Class 11 Biology” to help you revise key concepts. These questions are ideal for board exams and competitive exams like NEET.
Cell and Its Structure Class 11 Biology MCQs with Answers – MCQs
1. Who coined the term “cell”?
a) Anton van Leeuwenhoek
b) Robert Hooke
c) Matthias Schleiden
d) Theodor Schwann
2. Which of the following is the basic unit of life?
a) Atom
b) Molecule
c) Cell
d) Tissue
3. Which scientist is known for discovering the nucleus in the cell?
a) Robert Brown
b) Rudolf Virchow
c) Robert Hooke
d) Anton van Leeuwenhoek
4. Cell theory was proposed by:
a) Schleiden and Schwann
b) Watson and Crick
c) Darwin and Wallace
d) Mendel and Morgan
5. Which of the following is not a part of the cell theory?
a) All living organisms are composed of cells.
b) Cells are the basic unit of life.
c) All cells arise from pre-existing cells.
d) All cells have a nucleus.
6. Prokaryotic cells lack:
a) DNA
b) Cell membrane
c) Nucleus
d) Cytoplasm
7. Which of the following organisms is prokaryotic?
a) Amoeba
b) Paramecium
c) Bacteria
d) Fungi
8. Eukaryotic cells are characterized by the presence of:
a) Cell wall
b) Nucleus
c) Plasmids
d) Circular DNA
9. Which organelle is known as the control center of the cell?
a) Mitochondria
b) Nucleus
c) Ribosome
d) Golgi apparatus
10. The jelly-like substance within the cell is called:
a) Nucleoplasm
b) Cytoplasm
c) Protoplasm
d) Endoplasm
We have completed 10 Questions Cell and Its Structure Class 11 Biology
11. Which organelle is responsible for energy production?
a) Ribosome
b) Mitochondria
c) Lysosome
d) Golgi apparatus
12. The site of protein synthesis in the cell is:
a) Nucleus
b) Ribosome
c) Mitochondria
d) Lysosome
13. Which organelle is involved in the modification and packaging of proteins?
a) Endoplasmic reticulum
b) Golgi apparatus
c) Lysosome
d) Mitochondria
14. The rough endoplasmic reticulum is associated with:
a) Lipid synthesis
b) Protein synthesis
c) DNA replication
d) Detoxification
15. Which organelle contains digestive enzymes?
a) Mitochondria
b) Lysosome
c) Ribosome
d) Golgi apparatus
16. The smooth endoplasmic reticulum is involved in:
a) Protein synthesis
b) Lipid synthesis
c) DNA replication
d) RNA transcription
17. Which organelle is known as the “suicide bag” of the cell?
a) Mitochondria
b) Lysosome
c) Peroxisome
d) Golgi apparatus
18. The double membrane-bound organelle containing its own DNA is
a) Ribosome
b) Mitochondria
c) Lysosome
d) Golgi apparatus
19. Which organelle is responsible for photosynthesis in plant cells?
a) Mitochondria
b) Chloroplast
c) Ribosome
d) Golgi apparatus
20. The organelle responsible for detoxification in liver cells is
a) Rough ER
b) Smooth ER
c) Lysosome
d) Peroxisome
We have completed 10 Questions Cell and Its Structure Class 11 Biology
21. The cell membrane is primarily composed of:
a) Proteins and carbohydrates
b) Lipids and proteins
c) Nucleic acids and proteins
d) Lipids and nucleic acids
22. The model describing the structure of the cell membrane is
a) Fluid Mosaic model
b) Sandwich model
c) Unit membrane model
d) Lamellar model
23. Which component of the cell membrane helps in cell recognition?
a) Phospholipids
b) Proteins
c) Glycoproteins
d) Cholesterol
24. The movement of water across a semipermeable membrane is called:
a) Diffusion
b) Osmosis
c) Active transport
d) Facilitated diffusion
25. Which process requires energy to transport substances across the cell membrane?
a) Diffusion
b) Osmosis
c) Active transport
d) Facilitated diffusion
26. Endocytosis is the process by which cells:
a) Release substances
b) Take in substances
c) Transport substances
d) Synthesize proteins
27. Phagocytosis is a type of:
a) Exocytosis
b) Pinocytosis
c) Endocytosis
d) Diffusion
28. The process of expelling materials from the cell is called:
a) Endocytosis
b) Exocytosis
c) Phagocytosis
d) Pinocytosis
29. Which of the following is not a function of the plasma membrane?
a) Transport of nutrients
b) Energy production
c) Cell Signaling
d) Structural support
30. Cholesterol in the cell membrane functions to:
a) Increase fluidity
b) Decrease permeability
c) Stabilize the membrane
d) All of the above
We have completed 10 Questions Cell and Its Structure Class 11 Biology
31. Which structure is present only in plant cells?
a) Mitochondria
b) Cell wall
c) Ribosomes
d) Nucleus
32. The primary component of the plant cell wall is:
a) Chitin
b) Cellulose
c) Peptidoglycan
d) Lignin
33. Plasmodesmata are:
a) Channels between plant cells
b) Junctions in animal cells
c) Cell wall components
d) Organelles
34. Which organelle is responsible for maintaining turgor pressure in plant cells?
a) Mitochondria
b) Central vacuole
c) Chloroplast
d) Nucleus
35. In animal cells, the centrosome contains:
a) Centrioles
b) Microfilaments
c) Microtubules
d) Intermediate filaments
36. Which of the following is not found in prokaryotic cells?
a) DNA
b) Ribosomes
c) Nucleus
d) Plasma membrane
37. The genetic material in prokaryotic cells is located in the:
a) Nucleus
b) Nucleoid
c) Nucleolus
d) Plasmid
38. Flagella are used for:
a) Protein synthesis
b) Energy production
c) Movement
d) Cell division
39. Cilia and flagella have a core structure of:
a) 9+2 arrangement of microtubules
b) 9+0 arrangement of microtubules
c) 8+2 arrangement of microtubules
40. Which organelle is primarily responsible for the synthesis of lipids and detoxification of harmful substances in the cell?
a) Rough Endoplasmic Reticulum
b) Smooth Endoplasmic Reticulum
c) Golgi Apparatus
d) Lysosome
We have completed 10 Questions Cell and Its Structure Class 11 Biology
Conclusion:
We hope this set of 40 MCQs on “Cell and Its Structure” helps strengthen your understanding of fundamental biology concepts. These questions are ideal for quick revision and practice before exams.