CBSE Class 8 Science Worksheet
Cell – Structure and Functions
1.
Gaurd cells present in
A)
Amoeba
B)
Virus
C)
Human egg
D)
Plants
2.
The most important function of the cell membrane is that it:
A)
controls the entry and exit of materials from cells.
B)
controls only the entry of materials into cells
C)
controls only the exit of materials from cells
D)
allows entry and exit of materials without any control.
3.
The only cell- organelle seen in prokaryotic cell is
A)
mitochondria
B)
ribosomes
C)
plastids
D)
lysosomes
4.
Fill in the blanks: Rough endoplasmic reticulum looks rough due to _________.
5.
Write the function of nerve cells.
6.
cell was discovered by??
A)
leuuwenhoek
B)
Robert Hooke
C)
Robert swanson
D)
Robert brown
7.
Who coined the term protoplasm?
A)
Robert Hooke
B)
Louie Pastur
C)
JE Purkinje
D)
Edward jenner
8.
Fill in the blanks: __________ cells can contract and relax.
9.
Fill in the blanks: Muscle cells are ___________ shaped.
10.
The membrane around the vacuole is known as
A)
Tonoplast
B)
Elaioplast
C)
Cytoplast
D)
Amyloplast
11.
How many daughter cells are formed in meiosis?
12.
Fill in the blanks: _______________ cell doesn't have a true nucleus.
14.
Choose the correct answer: The organelle which is present only in plants is ____________.
A)
Mitochondria
B)
Ribosomes
C)
Lysosomes
D)
Plastids
15.
Choose the correct answer: The shape of red blood cells in humans is ________.
A)
spindal
B)
spherical
C)
helical
D)
elliptical
16.
Choose the correct answer: Colourless plastid is ________.
A)
Chloroplast
B)
Chromoplast
C)
Leucoplast
D)
None of these
17.
Which of the following separates nucleus from cytoplasm?
A)
Nuclear membrane
B)
Cell wall
C)
cell membrane
D)
None of these
18.
Fill in the blanks: Cell was discovered in the year _________.
19.
Tissue combine to form
A)
cell
B)
organ
C)
organelles
D)
body
20.
Fill in the blanks: The smallest cell is _______________.
CBSE Class 8 Science Worksheet
Cell – Structure and Functions
Answers
1.
Option D
2.
Option A
3.
Option B
4.
ribosomes
5.
They receive and transfer message from various parts of body to brain and vice versa and also helps in controlling and coordinating the function of different parts of body.
6.
Option B
7.
Option C
8.
Muscle
9.
spindle
10.
Option A
11.
Option D
12.
prokaryotic
13.
Deoxyribonucleic acid
14.
Option D
15.
Option B
16.
Option C
17.
Option A
18.
1665
19.
Option B
20.
mycoplasma bacteria cell
