Download Cell Structure - Indian School Al Wadi Al Kabir

Indian School Al Wadi Al Kabir
Department of Science 2015-16
Class: 8 Sec…
Topic: Cell Structure & Functions
Work sheet No. 1
Name: ……………………………………………
Date:
…………………………………………………………………………………………………………………………
1. a. Match each cellular structure mentioned below with its particular function:
Nucleus, Cell wall, Lysosomes, Vacuoles, Plastids, Cytoplasm, Centrosome,
Cell membrane, Ribosomes, Mitochondria, Endoplasmic reticulum, Golgi bodies.
Function of the cell structure
Gives shape & rigidity
to the cell
Cell Structure
Regulates movement of
substances in & out of the cell
Site of metabolic functions
Control centre of the cell
Secrete enzymes ,store proteins
Site of protein synthesis Cell division
Release energy from food
Contain coloured pigments,
Site of photosynthesis
Store food,water & waste
Destroy damaged cells &
unwanted cell products
b. Which of the above structures are found in both plant cells and in animal cells?
2. a) Draw neat labelled diagrams of an animal cell and a plant cell.
b) State the differences between the two.
Page 1 of 2
3. Answer the following questions in one sentence each:
a) Define a cell.
b) What are unicellular organisms? Give an example.
c) How is the shape of the nerve cell connected with its function?
4. Differentiate between the following:
a) Protoplasm and Cytoplasm
b) Organ and Organelle
c) Prokaryotic and Eukaryotic cell
d) Chromosome and Ribosome
e) Chloroplast and Chromoplast
5. Give reasons:
a) Plants do not have bones, but have a rigid structure.
b) Leaves are green in colour, whereas flowers are of different colours.
c) Cell division takes place in all organisms.
d) Mitochondria are referred to as ‘Power Houses’ of the cell.
e) Paramecium is considered an organism though it is made up of only one cell.
6. HOTS
Compare the cell to a factory. Place the organelles listed below against the corresponding
factory areas.
Ribosomes, lysosomes, Mitochondria, Cell membrane, Golgi bodies, Nucleus,
Nuclear membrane, Endoplasmic reticulum, Cytoplasm.
a) Main office:
b) Office wall
c) Area surrounding main office:
d) Production units
e) Supply units
f) Recycling units
g) Power house
h) Boundary wall of the factory
i) Packaging unit
7. Answer the following questions in three sentences each.
Discuss the importance of:
a) Postulates of the cell theory
b) Cell division
Page 2 of 2
Prepared by Mrs. Lalitha Bennett