Download Worksheet to improve knowledge and understanding

Worksheet to improve knowledge and understanding
International Indian School Buraidah
Subject: Biology Class: IX
Work Sheet On The fundamental unit of life
1- Look at the magnified image (X700) picture and answer the following questions in given
space.
i)
What are those blocks in the picture?........................................................
ii)
iii)
iv)
Who discovered them for the first time?..................................................
Label two identified structures as A and B with pencil on the above image.
How will you prepare a temporary mount of onion peel? or make a slide to see or observe
onion structural units, write in order the steps to prepare a slide
1-Take a small piece of onion bulb……………………………………………………………………………………..
……………………………………………………………………………………………………………………………………………
2-…………………………………………………………………………………………………………………………………………
3-…………………………………………………………………………………………………………………………………………
4-…………………………………………………………………………………………………………………………………………
v)
How the scientist discovered the fundamental unit of life?....................................................
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………
IISB KSA
Page 1
Worksheet to improve knowledge and understanding
vi)
…………………………………………………………………………………………………………………………………………….
How will you use microscope to see the small structures in the above image?
…………………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………………………….
2- Look at the microscopic image and answer the following questions
i)
What is the function of cell membrane?1...................................................................................
2…………………………………………………………………………………………………………………………………………….
3…………………………………………………………………………………………………………………………………………….
IISB KSA
Page 2
Worksheet to improve knowledge and understanding
ii)
What is the difference between (RER) Rough Endoplasmic Reticulum and (SER) Smooth
Endoplasmic Reticulum.
RER (Rough Endoplasmic
Reticulum)
iii)
SER (Smooth Endoplasmic
Reticulum)
Chromosomes are found in the nucleus, they are not shown in the above image, draw a
chromosome in the nucleus.
What compose the chromosomes? and what is the function of chromosomes?
iv)
Chromosomes are composed of……………………………………………………………………….
Function of chromosome ………………………………………………………………………….........
………………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………
V
Why are lysosomes known as suicidal bags?
………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………
Vi
Where are proteins synthesized inside the cell?
……………………………………………………………………………………………………………………………………………….
……………………………………………………………………………………………………………………………………………….
Vii
DNA or Genetic material is found in the form of chromosomes in an eukaryotic cell,
apart from that find out any TWO other places and underline the organelles which have their
own genetic material or DNA in the following organelles.
IISB KSA
Page 3
Worksheet to improve knowledge and understanding
Mitochondria ribosomes
Golgi complex chloroplast
vacuoles
3- Find out the structural differences between prokaryotic cell (bacterium) and eukaryotic cell.
Write in table
Sl.
No
Structures
1
Size
2
Nuclear region or
nucleus
3
Chromosome
4
Membrane bound
cell organelles
Prokaryotic cell
Eukaryotic cell
4- Find out the similarities between the following types of cells. Write YES or NO in the table
1 Cell membrane 2 Nucleus
3 Cytoplasm
4 DNA 5 Cell wall 6 Ribosomes 7 Mitochondria
Sl.
No
Bacterium (Prokaryotic
cell)
Cheek Cell (animal)
Leaf cell (Plant)
1
2
3
5
6
7
IISB KSA
Page 4
Worksheet to improve knowledge and understanding
5- What do you know about the cell and cell organelles? Check in the table and fill the correct
structure and function in the table. The first one is given as EXAMPLE to make easy.
Sl.
No
Cell Organelle
1
Plastids
2
Mitochondria
3
Ribosomes
4
Lysosomes
5
Chromosomes
6
Golgi Apparatus
7
Endoplasmic
reticulum
8
Vacuoles
9
CELL MEMBRANE
10
NUCLEUS
11
CYTOPLASM
IISB KSA
Found in Cell: plant,
animal, Bacterium
prokaryotic,
eukaryotic
Only In Plants
Structure
Function
They are of two types,
Membrane bound
structures, Have pigments
and their own DNA
Chloroplast for
photosynthesis, leucoplast
to store starch, oils and
protein granules.
Page 5
Worksheet to improve knowledge and understanding
6- With the reference of the above table answer the following questions.
i)
What would happen to the life of a cell if there was no Golgi apparatus?
………………………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………………………
Which organelle is known as the power house of the cell? Why?
…………………………………………………………………………………………………………………………………….
ii)
…………………………………………………………………………………………………………………………………….
Where do the lipids and proteins constituting the cell membrane get synthesized?
…………………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………………….
7- How does an amoeba obtain its food?
……………………………………………………………………………………………………………………………………………………
8- What is osmosis? ……………………………………………………………………………………………………………………….
…………………………………………………………………………………………………………………………
………………………………………………………………………………………………………………………..
………………………………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………
_____________________________________________________________________________________
IISB KSA
Page 6