1. B 2. C 3. C 4. B 5. C
B. Differentiate between the following:-
1. Unicellular organisms consists of one cell. example euglena
Multicellular organisms made up of more than one cell. example the tiger
2. Lysosomes are the storehouse of digestive enzymes. They are called suicidal bags.
Parioxisomes contain enzyme. These are protective organelles of the cell.
3. Onion cell is plant cell and human cheek cell, a animal cell.
4. Plant cell contain chromoplasts, chromoplasts is absent in animal cell.
Plant cell is rectangular and animal cell,circular.
C. Give one word answer for each of the following:-
1. Tissue 2. Pelagibacter 3. Vacuole 4. Golgi
D. Match column A with column B:-
1. Group 2. Locomotion 3. Eukaryotic cells 4. Animal cells 5. Cell division
E. Give two examples for each of the following:-
1. Cheek cell and Skin 2. Mitosis and Meiosis
3. Cork and Root
F. Give reason for each of the following:-
1. Living things have life. Cell is basic fundamental part of life. Combination of cell form life
2. Plant cells are bigger than animal cells because it contain large vacuoles.
3. Cell membrane is essential because within it all organelles.
4. Plant cell has eukaryotic cells. Which have well organised nucleus with a nuclear membrane.
G. Write true or false:-
1. True 2. True 3. True 4. False
H. Circle the odd one out:-
1. Humans 2. Cytology 3. Plastids 4. Plasma
I. Fill in the blanks up:-
1. Organ 2. Cell wall and Cell 3.Microorganism 4. Cell 5. Parenchyma cells
J. Short answer questions:-
1. Cell is the structural and functional unit of life. The silent points of the cell theory:-
All living things are made up of Cells.
All the cells are similar in their function but they are not identical.
New cells arise due to division in pre existing cells.
The organisations of cell in the body of a living organism determines its structure.
Functioning of an organism depends on the way its cells work.
2. Shape of a cell is called its structure. Its various parts:-
(i) Nucleus (ii) Cytoplasm (iii) Cell membrane
(iv) Cell wall.
3. Intake food is digested by our body. Nutrients from digested food causes grow of our body by protein.
As soon as it reaches a critical size, it divides to form two cells. Process of division of a cell into two cell is called cell division.
4. Millions of cells are there in our body. example cheek cell, respiratory cell
5. In 1665 and English scientist, Robert Hooke developed a primitive and simple magnifying device to see cork cell. This is cytology.
K. Long answer questions:-
1. Functions of different parts of cell:-
Mitochondria- it is powerhouse of cell.
Plastids are chloroplast. Gives green colour to plants.
Chromoplast- These red or brown and give colour to fruit and flower.
Leucoplast is white in colour. Food is store in these plastids.
Lysosomes- These are the storehouse of digestive enzymes.
Endoplasmic reticulum- Through it material are transferred within and outside the cell.
Ribosomes- Their main function is to synthesise proteins.
Golgi bodies/ Apparatus- Their main function is to receive and distribute chemical products.
Centrosome- It helps in cell division.
Vacuole- Sac like a structure is store food, water and waste.
2. Plant cells are eukaryotic cells have distinctive feature.
A cell wall made of cellulose.
Plastids are present.
Animal cell are typical eukaryotic which are enclosed by plasma membrane.
3. Onion cell is plant cell and human cheek cell,animal cell.
4. Cell membrane-The thin porous layer which encloses all the organelles of the cell is called the cell membrane. It is also called the plasma membrane. Just like the outer boundary of cell, it provides protection to the internal contents of the cell, giving it shape. It controls the movement of substances into and out of the cell, allowing only certain substances to enter and leave. This is the reason it is called semi permeable membrane. But plant,fungi, bacteria have cell membrane, which is called cell wall.
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