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ICSE Class IX Question Bank 2024 : Biology : Cell Unit of Life

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BIOLOGY Board ICSE Class 9 Topic CELL:UNIT OF LIFE 1. Define a cell. 2. When was the cell theory propounded? 3. Name the scientist who observed the honeycomb-like structures in a thin section of cork under simple microscope. What did he mean by these structures? 4. Draw labeled diagrams to show various structures found in animal cells. 5. What is cell theory? Name the scientists who formulated it. 6. Give three differences between cell wall and cell membrane. 7. Differentiate between the following (a) Cytoplasm and Protoplasm (b) Cell organelles and Cell inclusions (c) Prokaryotic and Eukaryotic cell 8. The following diagram represents cells from cheek lining (Fig. I) and plant cells (Fig. II). Label the parts against the indicated alphabets / numbers 9. Give the location and the function of the following parts of the cell: (a) Plasma membrane (b) Chromosomes (c) Endoplasmic reticulum (d) Ribosome 10. Fill in the blanks: (i) Ribosomes are rich in _____________ and ______________. (ii) RNA stands for ________________. (iii) Virchow stated ________________________________________________ Head Office: 106-107-108 Lake Homes Shopping Complex, Chandivali IRB Road, Mumbai 400076 T.: 022 4120 3067 E.: info@speedlabs.in BIOLOGY (iv) Plasma membrane is made up of ______________ and _____________. (v) Membrane less nuclear area found in prokaryotic cells is called _____________ 11. Lysosomes are said to be suicidal bags . Comment. 12. Name the features possessed (a) by plant cells only, and (b) by animal cell only. 13. Where genes are present in a cell and what is their chemical nature? 14. Differentiate between the following (a) Nucleus and Nucleolus (on the basis of function) (b) Chloroplast and Leucoplast (on the basis of function) (c) Chromatin and Chromosomes (on the basis of structure) 15. What are plastids? Give different kinds of plastids and their functions. 16. State four differences between a plant cell and an animal cell. 17. Complete the following by selecting the correct word (i) Genes are made up of __________. (RNA / DNA / protein) (ii) In plants, cell wall is mainly composed of __________. (chitin / cellulose / protein) (iii) Nucleus was discovered by __________________. (Robert Hooke / Robert Brown/ M. J. Schleiden) (iv) Oxysomes are found in ______________. (chloroplast / mitochondria / golgi body) 18. Give structure of the nucleus. What is the importance of nucleus? 19. Give the location and the function of the following parts of the cell (a) Cell wall ____________________________________________ (b) Centriole ____________________________________________ (c) Nucleolus ____________________________________________ (d) Chloroplast____________________________________________ 20. Answer the following: (a) Cellular digestion is associated with which organelle? (b) Name two cell organelles which are enclosed by double membrane walls. (c) A plastid containing colored pigments (d) What is the term used to describe the nucleus lacking the nuclear membrane? (e) Name the membrane system connecting the nucleus with the plasma membrane. Head Office: 106-107-108 Lake Homes Shopping Complex, Chandivali IRB Road, Mumbai 400076 T.: 022 4120 3067 E.: info@speedlabs.in

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