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Study Material for Class 9 Science Chapter 5 The Fundamental Unit of Life
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Class 9 Science Chapter 5 The Fundamental Unit of Life
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1. Define Cell
2. What will happen to a cell if its nucleus is removed?
3. Who proposed the Cell theory ?
4. What is Nucleoid ?
5. Fill in the blanks:-
(a) New cells are formed from ______________.
(b) Movement of water molecules from their higher concentration to their lower concentration through a semi- permeable membrane is called ______________.
(c) The functional components of cell are ______________, ______________& ______________.
(d) Protoplasm has two parts- ______________ & ______________.
(e) Nucleus, mitochondria & plastids have their own ___________ & ____________.
(f) The shrinkage or contraction of the contents of the cell away from the cell wall is known as ______________.
(g) The process by which Amoeba can engulf a food particle is ______________.
(h) ______________ is the manufacture of lipids required for making cell membrane.
(i) A cell that lacks nuclear membrane is called a prokaryotic cell & the nuclear region is called ______________.
(j) Movement of materials in & out of the cell takes place by ______________ & ______________.
6. Identifiy and name the following cell structures:
a) The undefined nuclear region of Prokaryotic cell.
b) Site of energy release inside the cell.
7. Name the kind of plastid which is important for photosynthesis in leaves of the plants.
8. Name the two components of chromosomes.
9. When does the chromatin network separate out to form chromosomes?
10. Name the cell organelle that detoxifies poisons and drugs.
11. Name the cell organelle that is associated with protein synthesis.
12. Name a cell which changes its shape.
13. Name the functional unit of DNA that carries genetic informations.
14. Expand the word DNA.
15. State the primary functions of plasma membrane.
16. Name a cell that lacks cell wall
17. Name the main constituent substance present in plant cell wall.
18. Name the cell which is responsible for intracellular transport.
19. Name the Reticulum which has ribosome’s attached to it .
20. Name a cell that does not have a nucleus, what are they called?
21. The largest cell in the human body is -
(a) Nerve cell (b) Muscle cell
(c) Liver cell (d) Kidney cell
22. The barrier between the protoplasm and the other environment in an animal cells -
(a) Cell wall (b) Nuclear membrane
(c) Tonoplast (d) Plasma membrane
23. The term ‘Cell’ was given by -
(a) Leeuwenhoek (b) Robert hooke
(c) Flemming (d) Robert Brown
24. Who proposed the cell theory? -
(a) Schleiden and Schwann (b) Watson and Crick
(c) Darwin and Wallace (d) Mendel and Morgan
25. A plant cell differs from an animal cell in the absence of -
(a) Endoplasmic Reticulum (b) Mitochondria
(c) Ribosome (d) Centrioles
26. Centrosome is found in -
(a) Cytoplasm (b) Nucleus
(c) Chromosomes (d) Nucleolus
27. The power house of a cell is -
(a) Chloroplast (b) Mitochondrion
(c) Golgi apparatus (d) Nucleolus
28. Within a cell the site of respiration (oxidation) is the -
(a) Ribosome (b) Golgi apparatus
(c) Mitochondrion (d) Endoplasmic Reticulum
29. Which is called ‘Suicidal Bag’?
(a) Centrosome (b) Lysosome
(c) Mesosome (d) Chromosome
30. Ribosomes are the center for -
(a) Respiration (b) Photosynthesis
(c) Protein synthesis (d) Fat synthesis
31. Double membrane is absent in -
(a) Mitochondrion (b) Chloroplast
(c) Nucleus (d) Lysosome
32. Cell organelle found only in Plant is -
(a) Golgi apparatus (b) Mitochondria
(c) Plastids (d) Ribosomes
33. Organisms lacking nucleus and membrane bound organelle are -
(a) Diploids (b) Prokaryotes
(c) Haploids (d) Eukaryotes
34. Animal cell is limited by -
(a) Plasma membrane (b) Shell membrane
(c) Cell wall (d) Basement membrane
35. The network of Endoplasmic Reticulum is present in the -
(a) Nucleus (b) Nucleolus
(c) Cytoplasm (d) Chromosomes
36. Lysosome are reservoirs of -
(a) Fat (b) RNA
(c) Secretary Glycoprotein (d) Hydrolytic Enzymes
37. The membrane surrounding the vacuole of a plant cell is called -
(a) Tonoplast (b) Plasma membrane
(c) Nuclear membrane (d) Cell wall
38. Cell secretion is done by -
(a) Plastids (b) ER
(c) Golgi apparatus (d) Nucleolus
39. Centrioles are associated with -
(a) DNA synthesis (b) Reproduction
(c) Spindle formation (d) Respiration
40. Main difference between animal cell and plant cell is -
(a) Chromosome (b) Ribosome
(c) Lysosome (d) Endoplasmic Reticulum
41. Animal cell lacking nuclei would also lack in -
(a) Chromosome (b) Ribosome
(c) Lysosome (d) Endoplasmic Reticulum
42. Plasmolysis occurs due to -
(a) Absorption (b) Endosmosis
(c)Osmosis (d)Exosmosis
43. A plant cell becomes turgid due to -
(a) Plasmolysis (b) Exosmosis
(c) Endosmosis (d) Electrolysis
44. Solute concentration is higher in the external solution -
(a) Hypotonic (b) Isotonic
(c) Hypertonic (d) None of the above
45. A cell placed in hypertonic solution will -
(a) Shrink (b) Show Plasmolysis
(c) Swell up (d) No change in shape or size
46. The radiant energy of sunlight is converted to chemical energy and is stored as -
(a) AMP (b) ADP
(c)ATP (d) APP
47. Which of the following organelle does not have membrane?
(a) Ribosome (b) Nucleus
(c) Chloroplast (d) Mitochondria
48. Root hair absorbs water from soil through -
(a) Osmosis (b) Active transport
(c) Diffusion (d) Endocytosis
49. The number of lenses in compound light microscope is -
(a) 2 (b)3 (c) 4 (d)1
50. The history of the cell began in 1665 with the publication of Micrographia in London by -
(a) Robert Hooke (b) Robert Brown
(c) Strasburger (d)Dujardin
51. Cell inclusions are -
(a) Non-living materials present in the cytoplasm
(b) Another name of cell organelle
(c) Cytoskeletal framework of cell
(d) Combined name for cell wall and plasma membrane
52. Which cell organelle is not bounded by a membrane -
(a) Ribosome (b) Lysosome
(c)ER (d)Nucleus
53. Which of the following cellular part possess a double membrane?
(a) Nucleus (b) Chloroplast
(c)Mitochondrion (d)All of the above
54. Cristae and Oxysomes are associated with -
(a) Mitochondria (b) Plastids
(c) Golgi apparatus (d)Plasma membrane
55. Karyotheca is another name of -
(a) Nuclear envelope (b) Nucleus
(c)Nuclear pores (d)Nucleolus
56. Cell organelle that acts as supporting skeletal framework of the cell is -
(a) Golgi apparatus (b) Nucleus
(c) Mitochondria (d) ER
57. Plastids are present in -
(a) Animal cell only
(b) Plant cells only
(c) Both animal cells and Plant cells
(d) Neither animal nor plant cell
58. Cell wall of plant is chiefly composed of -
(a) Hemicellulose (b) Cellulose
(c) Phospholipids (d)Proteins
59. Intercellular connections of plant cells are called -
(a) Middle lamella (b) Micro fibrils
(c) Matrix (d) Plasmodesmata
60. Genes are located on the -
(a) Chromosomes (b) Nucleolus
(c) Nuclear membrane (d)Plasma membrane
61. Chromatin consists of -
(a) RNA (b) DNA
(c) RNA and histones (proteins) (d)DNA and histones (proteins)
62. Different types of chromosomes can be recognized by the positions of the following separating the two arms -
(a) Centromere (b) Genes
(c) Spindle (d)Nucleus
63. Name of the process that requires energy provided by ATP -
(a)Diffusion (b) Osmosis
(c) Active transport (d)Plasmolysis
64. What is the advantage of multicellularity over unicellularity?
65. What are the chromosomes made up of?
66. A cell placed in a solution swells up. What kind of solution is it? Why does it happen?
67. Why are lysosomes known as “suicidal bags”?
68. Why is the nucleus so significant in a cell?
69. Differentiate between plant and animal cells.
70. Give the major functions of the following cell organelles-
71. Why is the cell known the 'fundamental and structural unit of life '
72. What is a semi permeable membrane? what are the differences between semi permeable membrane and selectively permeable membrane?
73. Which cell in the human body does not have the mitochondria?
74. What are plastids? Write their functions?
75. Which structure of animal cells forms the asters of spindle ?
76. Name two semi- autonomous organelles?
77. Which cell organelle is rich in acid hydrolases?
78. Which cell organelles are called ribonucleoprotine particle?
79. Differentiate between SER and RER
80. What is the difference between eukaryotes and prokaryotes?
81. What is the difference between osmosis and diffusion.
82. Where are peroxisomes found ?
83. What are the chemical reactions take place in cytoplasm, nucleoplasm, and in mitochondria?
84. What is Diffusion?
85. What is dictyosomes ?
86. What would happen if an animal cell is kept in distilled water for 24 hours.
87. Give 5 examples of single celled organisms.
88. What are multicellular organisms ? Give an example.
89. Which cell organelle is commonly referred as the suicidal bags of the cell.
90. Name the process through which an amoeba acquires its food from the external surroundings.
91. State the functions of chromosome in a cell.
92. What is Biogenisis?
93. Who discovered Golgi Apparatus?
94. Name the cell organelle which is involved in the formation of lysosomes.
95. What is Endosmosis?
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