JAIVINS ACADEMY (2024-2025)

IX BIOLOGY
MCQ QUESTIONS
1. Which of the following is known as the basic unit of life?
a) Atom b) Molecule c) Cell d) Tissue
2. Who discovered the cell?
a) Robert Hooke b) Anton van Leeuwenhoek c) Matthias Schleiden d) Theodor Schwann
3. Which organelle is known as the powerhouse of the cell?
a) Nucleus b) Endoplasmic reticulum c) Golgi apparatus d) Mitochondria
4. What is the function of ribosomes in a cell?
a) Photosynthesis b) Protein synthesis c) Lipid synthesis d) Cellular respiration
5. Which structure in the plant cell is responsible for photosynthesis?
a) Mitochondria b) Chloroplast c) Nucleus d) Ribosome
6. What is the semi-permeable membrane that surrounds the cell?
a) Cell wall b) Cytoplasm c) Plasma membrane d) Nuclear membrane
7. Which of the following is not found in a prokaryotic cell?
a) Ribosome b) Cell membrane c) Nucleus d) Cytoplasm
8. What is the fluid-filled space inside the cell called?
a) Cytoplasm b) Nucleoplasm c) Stroma d) Matrix
9. Which cell organelle is responsible for detoxifying harmful substances in the cell?
a) Lysosome b) Endoplasmic reticulum c) Golgi apparatus d) Peroxisome
10. Which of the following is a function of the cell membrane?
a) Provide strength to the cell b) Control cell division
c) Regulate the movement of substances in and out of the cell
d) Produce energy
11. What are the small structures within the cell that perform specific functions called?
a) Tissues b) Organs c) Organelles d) Systems
12. Which of the following organelles contains digestive enzymes?
a) Mitochondria b) Ribosome c) Lysosome d) Chloroplast
13. Where is the genetic material of a cell located?
a) Cytoplasm b) Nucleus c) Ribosome d) Mitochondria
14. Which of the following structures is unique to plant cells?
a) Cell wall b) Nucleus c) Mitochondria d) Lysosome
15. What is the primary function of the Golgi apparatus?
a) Energy production b) Protein synthesis
c) Modifying, sorting, and packaging of proteins and lipids
d) Photosynthesis
16. Which of the following is the site of aerobic respiration in a cell?
a) Ribosome b) Lysosome c) Mitochondria d) Chloroplast
17. What is the function of the vacuole in plant cells?
a) Protein synthesis b) Storage of nutrients and waste products
c) Photosynthesis d) Cellular respiration
18. Which organelle is responsible for the synthesis of lipids?
a) Ribosome b) Rough endoplasmic reticulum
c) Smooth endoplasmic reticulum d) Golgi apparatus
19. Which of the following is not a component of the cell theory?
a) All living organisms are composed of cells b) The cell is the basic unit of life
c) All cells arise from pre-existing cells d) All cells contain a nucleus
20. Which part of the cell is responsible for maintaining its shape and protecting it from mechanical damage?
a) Plasma membrane b) Cytoplasm c) Cell wall d) Nucleus
21. What is the primary function of the nucleus in a cell?
a) Produce energy b) Control cell activities and store genetic information
c) Transport materials d) Synthesize proteins
22. Which of the following cell organelles is involved in the formation of lysosomes?
a) Endoplasmic reticulum b) Mitochondria c) Golgi apparatus d) Chloroplast
23. What is the function of the nucleolus?
a) Synthesizing ribosomes b) Storing genetic information
c) Producing ATP d) Photosynthesis
24. Which structure acts as the control center of the cell?
a) Mitochondria b) Nucleus c) Golgi apparatus d) Ribosome
25. Which of the following is not a function of the endoplasmic reticulum?
a) Protein synthesis b) Lipid synthesis c) Detoxification d) Photosynthesis
26. What is the double-layered membrane that surrounds the nucleus called?
a) Nuclear envelope b) Plasma membrane c) Cell wall d) Mitochondrial membrane
27. Which of the following statements about chloroplasts is true?
a) They are found in animal cells b) They contain chlorophyll
c) They are involved in cellular respiration d) They synthesize proteins
28. Which of the following is a characteristic of eukaryotic cells?
a) Lack of nucleus b) Presence of membrane-bound organelles
c) Smaller in size compared to prokaryotic cells d) Lack of cytoplasm
29. What is the main component of the cell wall in plant cells?
a) Cellulose b) Starch c) Glycogen d) Protein
30. Which of the following organelles is known as the "suicide bag" of the cell?
a) Mitochondria b) Lysosome c) Nucleus d) Ribosome
31. What is the primary function of mitochondria?
a) Photosynthesis b) Protein synthesis
c) Cellular respiration and energy production d) Lipid synthesis
32. Which of the following is true about prokaryotic cells?
a) They have a true nucleus b) They lack membrane-bound organelles
c) They are generally larger than eukaryotic cells d) They contain mitochondria
33. Which cell organelle is involved in the packaging and transport of proteins?
a) Nucleus b) Ribosome c) Golgi apparatus d) Endoplasmic reticulum
34. What is the main difference between rough and smooth endoplasmic reticulum?
a) Presence of ribosomes on rough ER b) Presence of ribosomes on smooth ER
c) Rough ER synthesizes lipids d) Smooth ER synthesizes proteins
35. Which organelle is responsible for producing ATP?
a) Nucleus b) Ribosome c) Mitochondria d) Lysosome
36. Which of the following structures is involved in the synthesis of ribosomes?
a) Nucleus b) Golgi apparatus c) Nucleolus d) Endoplasmic reticulum
37. Which organelle is known as the "cell's post office"?
a) Ribosome b) Nucleus c) Golgi apparatus d) Mitochondria
38. Which of the following structures is found in both plant and animal cells?
a) Cell wall b) Chloroplast c) Nucleus d) centrioles
39. Which of the following is a prokaryotic cell?
a) Animal cell b) Plant cell c) Bacterial cell d) Fungal cell
40. Where is the genetic material of a prokaryotic cell located?
a) Nucleus b) Nucleoid region c) Mitochondria d) Endoplasmic reticulum