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🔥🔥 Biology grade 9 all unit summarized short note🔥🔥

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👉Biology questions

1. Which organelle is responsible for the production of energy in a cell?
   a) Nucleus
   b) Golgi apparatus
   c) Mitochondria
   d) Endoplasmic reticulum

2. What is the function of the cell membrane?
   a) Protection and support
   b) Control of substances entering and leaving the cell
   c) Protein synthesis
   d) Storage of genetic material

3. Which of the following is NOT a type of cell division?
   a) Mitosis
   b) Meiosis
   c) Cytokinesis
   d) Osmosis

4. What is the role of ribosomes in a cell?
   a) Protein synthesis
   b) Energy production
   c) Storage of genetic material
   d) Cell division

5. Which of the following is NOT a component of the cytoskeleton?
   a) Microtubules
   b) Microfilaments
   c) Intermediate filaments
   d) Cell wall

6. What is the function of the Golgi apparatus?
   a) Protein synthesis
   b) Energy production
   c) Packaging and modification of proteins
   d) Storage of genetic material

7. Which organelle is responsible for the synthesis of lipids?
   a) Nucleus
   b) Golgi apparatus
   c) Smooth endoplasmic reticulum
   d) Rough endoplasmic reticulum

8. What is the function of vacuoles in plant cells?
   a) Storage of water and nutrients
   b) Protein synthesis
   c) Energy production
   d) Cell division

9. Which of the following is NOT a type of cellular transport?
   a) Diffusion
   b) Osmosis
   c) Active transport
   d) Photosynthesis

10. Which organelle is responsible for detoxification of harmful substances in liver cells?
    a) Nucleus
    b) Golgi apparatus
    c) Smooth endoplasmic reticulum
    d) Rough endoplasmic reticulum

11. What is the function of lysosomes in a cell?
    a) Protein synthesis
    b) Energy production
    c) Breakdown of cellular waste and debris
    d) Storage of genetic material

12. Which of the following is NOT a characteristic of prokaryotic cells?
    a) Presence of a nucleus
    b) Lack of membrane-bound organelles
    c) Presence of DNA
    d) Presence of a cell membrane

13. What is the function of the centrioles in animal cells?
    a) Protein synthesis
    b) Energy production
    c) Cell division
    d) Storage of genetic material

14. Which organelle is responsible for photosynthesis in plant cells?
    a) Nucleus
    b) Golgi apparatus
    c) Chloroplasts
    d) Mitochondria

15. What is the function of the nuclear envelope?
    a) Protection of the nucleus
    b) Protein synthesis
    c) Energy production
    d) Storage of genetic material

16. Which of the following is NOT a type of cell junction?
    a) Desmosomes
    b) Tight junctions
    c) Gap junctions
    d) Cell wall

17. What is the function of the rough endoplasmic reticulum?
    a) Protein synthesis
    b) Energy production
    c) Packaging and modification of proteins
    d) Storage of genetic material

18. What is the function of the nucleolus in a cell?
    a) Protein synthesis
    b) Energy production
    c) Storage of genetic material
    d) Cell division

19. Which of the following is NOT a type of passive transport?
    a) Diffusion
    b) Osmosis
    c) Active transport
    d) Facilitated diffusion

20. What is the function of the cell wall in plant cells?
    a) Protection and support
    b) Control of substances entering and leaving the cell
    c) Protein synthesis
    d) Storage of genetic material