Match the columns I and II. Column I Column II (a) Chloroplast (i) Carries hereditary characters (b) Cell membrane (ii) Controls the activities of cells (c) Nucleus (iii) Site of photosynthesis (d) Chromosome (iv) Controls the movement of materials into and out of cells

(a) - (iii) The chloroplast is a type of plastid that is present in plant cells. It has a green pigment called chlorophyll which absorbs sunlight to prepare the food by the process of photosynthesis. Hence, it is the site of photosynthesis. (b) - (iv) The cell membrane is a semi-permeable membrane that encloses all the cell organelles and protects the cell. It controls the movement of materials in and out of cells. It is made up of protein and lipids. (c) - (ii) The nucleus is a double membranous organelle that is centrally located in a cell. It contains chromosomes which carry genetic information. It controls the activities of all the cell organelles. (d) - (i) The chromosome is a thread-like structure that is made up of DNA and proteins. It is depicted as an X shaped structure. The DNA has genes which carry the hereditary information from one generation to another. Hence, the correct answer is: Colum I Column II (a) Chloroplast (iii) Site of photosynthesis (b) Cell membrane (iv) Controls the movement of materials into and out of cells (c) Nucleus (ii) Controls the activities of cells (d) Chromosome (i) Carries hereditary characters

Match the Column I with Column II. Column I Column II (a) Control unit of cell (i) Mitochondria (b) Kitchen of the cell (ii) Chromoplast (c) Powerhouse of the cell (iii) Nucleus (d) Structural unit of organism (iv) Cell (v) Chloroplast

(a) - (iii) The nucleus is a double membranous organelle that is centrally located in the cell. It contains all the genetic information for the cell to carry out vital life processes. Hence, the nucleus is the control unit of the cell. (b) - (v) The chloroplast is a double membranous structure that contains a green pigment called chlorophyll. This pigment absorbs sunlight to perform the process of photosynthesis. This process occurs in the chloroplast due to which it is also known as the kitchen of the cell. (c) - (i) The double membranous structure that helps to provide energy is called mitochondria. It has enzymes that catalyse the process of respiration to provide energy. It is also known as the powerhouse of the cell. (d) - (iv) Cells are the structural and functional units of life. They perform all the vital processes such as respiration, reproduction, excretion, metabolism and response on their own. Many cells form a multicellular organism. Hence, the correct answer is: Column I Column II (a) Control unit of cell (iii) Nucleus (b) Kitchen of the cell (v) Chloroplast (c) Powerhouse of the cell (i) Mitochondria (d) Structural unit of organism (iv) Cell (ii) Chromoplast

Match the column I with column II. Column I Column II (a) Discovery of cell (i) Amoeba (b) Fundamental unit of life (ii) Cork (c) Living material of cell (iii) Robert Brown (d) Unicellular organism (iv) Robert Hooke (e) Part of bark (v) Cell (f) Discovery of nucleus (vi) Protoplasm

(a) - (iv) The cell is the structural and functional unit of life. It was discovered by Robert Hooke in 1665 from a thin slice of cork. He observed this piece of tissue with the help of his microscope. (b) - (v) The cell is the structural and functional unit of life. It can perform various vital life processes such as excretion, respiration, reproduction, metabolism and response. It can exist independently. For example: Amoeba is a unicellular organism that reproduces by binary fission and respires by simple diffusion. (c) - (vi) The living material of cell includes nucleus, cytosol and organelles. This living material is called protoplasm. (d) - (i) Organisms that are made up of a single cell are called unicellular organisms. Amoeba is a eukaryotic unicellular organism. (e) - (ii) Bark refers to the outer layers of stems of woody trees. Cork is a part of the bark. Robert hook observed this part of the tree and identified the cells in the year 1665. (f) - (iii) The nucleus is a double membranous structure that is centrally located in a cell. It contains all the genetic information. It encloses the chromosomes and nucleolus. It was discovered by Robert Brown. Hence, the correct answer is: Column I Column II (a) Discovery of cell (iv) Robert Hooke (b) Fundamental unit of life (v) Cell (c) Living material of cell (vi) Protoplasm (d) Unicellular organism (i) Amoeba (e) Part of bark (ii) Cork (f) Discovery of nucleus (iii) Robert Brown

E M B I B E

All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 5

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Paramecium is an irregularly shaped cell.

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Important Questions on Cell: Structure and Functions

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 6

Human cell is a eukaryotic cell.

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 7

Plastids are present in an animal cell.

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 8

There is a rigid cell wall in plant cells.

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 9

The living substance in a cell is called organelle.

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 10

All living organisms are made up of organs.

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 1

Match the columns I and II.

Column I	Column II
(a) Chloroplast	(i) Carries hereditary characters
(b) Cell membrane	(ii) Controls the activities of cells
(c) Nucleus	(iii) Site of photosynthesis
(d) Chromosome	(iv) Controls the movement of materials into and out of cells

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All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 2

Match the Column I with Column II.

Column I	Column II
(a) Control unit of cell	(i) Mitochondria
(b) Kitchen of the cell	(ii) Chromoplast
(c) Powerhouse of the cell	(iii) Nucleus
(d) Structural unit of organism	(iv) Cell
	(v) Chloroplast

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8th CBSE

IMPORTANT

All in One - SCIENCE CBSE Class 8>Chapter 8 - Cell: Structure and Functions>Chapter Practice>Q 3

Match the column I with column II.

Column I	Column II
(a) Discovery of cell	(i) Amoeba
(b) Fundamental unit of life	(ii) Cork
(c) Living material of cell	(iii) Robert Brown
(d) Unicellular organism	(iv) Robert Hooke
(e) Part of bark	(v) Cell
(f) Discovery of nucleus	(vi) Protoplasm

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