NCERT Solutions for Class 8 Science Cell-Structure and Functions [Old Book]
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Page 1
NCERT
SOLUTIONS
CLASS - 8TH
aglase .co
SOLUTIONS
CLASS - 8TH
aglase .co
Page 2
Book : Science Ncert Solutions | Chapter-8 Science
Class : 8th
Subject : Science
Chapter : 8
Chapter Name : CELL — STRUCTURE AND FUNCTIONS
Q1 Indicate whether the following statements are True (T) or False (F).
(a) Unicellular organisms have one-celled body. (T/F)
(b) Muscle cells are branched. (T/F)
(c) The basic living unit of an organism is an organ. (T/F)
(d) Amoeba has irregular shape. (T/F)
Answer. (a) Unicellular organisms have one-celled body. (T)
(b) Muscle cells are branched. (F)
(c) The basic living unit of an organism is an organ. (F)
(d) Amoeba has irregular shape. (T)
Page : 98 , Block Name : Exercise
Q2 Make a sketch of the human nerve cell. What function do nerve cells perform?
Answer.
The function of a nerve cell is to transmit messages to the brain and also to take away
messages from the brain to the receptor organs. Thus, it controls the working of different
parts of the body.
Q3 Write short notes on the following.
(a) Cytoplasm
(b) Nucleus of a cell
Answer. (a) Cytoplasm:
Page 1 of 6 Aglasem Schools
Class : 8th
Subject : Science
Chapter : 8
Chapter Name : CELL — STRUCTURE AND FUNCTIONS
Q1 Indicate whether the following statements are True (T) or False (F).
(a) Unicellular organisms have one-celled body. (T/F)
(b) Muscle cells are branched. (T/F)
(c) The basic living unit of an organism is an organ. (T/F)
(d) Amoeba has irregular shape. (T/F)
Answer. (a) Unicellular organisms have one-celled body. (T)
(b) Muscle cells are branched. (F)
(c) The basic living unit of an organism is an organ. (F)
(d) Amoeba has irregular shape. (T)
Page : 98 , Block Name : Exercise
Q2 Make a sketch of the human nerve cell. What function do nerve cells perform?
Answer.
The function of a nerve cell is to transmit messages to the brain and also to take away
messages from the brain to the receptor organs. Thus, it controls the working of different
parts of the body.
Q3 Write short notes on the following.
(a) Cytoplasm
(b) Nucleus of a cell
Answer. (a) Cytoplasm:
Page 1 of 6 Aglasem Schools
Page 3
Book : Science Ncert Solutions | Chapter-8 Science
It is a �uid that �lls the cell and occurs between the plasma membrane and the nucleus. Cell
organelles such as mitochondria, ribosomes, Golgi bodies, etc. are suspended in the cytoplasm.
The cytoplasm helps in the exchange of materials between cell organelles.
(b) Nucleus of a cell:
The nucleus is a spherical structure generally present at the centre of a cell. The nucleus is
composed of the following components:
Q4 Which part of the cell contains organelles?
Answer. Cytoplasm is the part of the cell that contains various organelles such as mitochondria,
ribosomes, Golgi bodies, etc. Cytoplasm is a �uid that �lls the cell and occurs between the
plasma membrane and the nucleus.
Q5 Make sketches of animal and plant cells. State three differences between them
Answer.
Page 2 of 6 Aglasem Schools
It is a �uid that �lls the cell and occurs between the plasma membrane and the nucleus. Cell
organelles such as mitochondria, ribosomes, Golgi bodies, etc. are suspended in the cytoplasm.
The cytoplasm helps in the exchange of materials between cell organelles.
(b) Nucleus of a cell:
The nucleus is a spherical structure generally present at the centre of a cell. The nucleus is
composed of the following components:
Q4 Which part of the cell contains organelles?
Answer. Cytoplasm is the part of the cell that contains various organelles such as mitochondria,
ribosomes, Golgi bodies, etc. Cytoplasm is a �uid that �lls the cell and occurs between the
plasma membrane and the nucleus.
Q5 Make sketches of animal and plant cells. State three differences between them
Answer.
Page 2 of 6 Aglasem Schools
Page 4
Book : Science Ncert Solutions | Chapter-8 Science
Q6 State the difference between eukaryotes and prokaryotes.
Answer.
Page 3 of 6 Aglasem Schools
Q6 State the difference between eukaryotes and prokaryotes.
Answer.
Page 3 of 6 Aglasem Schools
Page 5
Book : Science Ncert Solutions | Chapter-8 Science
Q10 Where are chromosomes found in a cell? State their function
Answer. The nucleus contains thread-like structures called chromosomes. Chromosomes play
an important role in the inheritance of characters. They
carry genes that help in the transfer of characters from the parents to the offspring.
Q11 ‘Cells are the basic structural units of living organisms’. Explain.
Answer. Cells constitute various components of plants and animals. A cell is the smallest unit
of life and is capable of all living functions. Cells are the building blocks of life. This is the
reason why cells are referred to as 'the basic structural and functional units of life'. All cells vary
in their shapes, sizes, and activities they perform. In fact, the shape and size of the cell is
related to the speci�c function it performs.
Q9 Explain why chloroplasts are found only in plant cells?
Answer. Chloroplasts are found only in plant cells. They contain a green pigment called
chlorophyll. This green pigment is important for photosynthesis in green plants. This
chlorophyll pigment traps solar energy and utilizes it to manufacture food for the plant.
Page 4 of 6 Aglasem Schools
Q10 Where are chromosomes found in a cell? State their function
Answer. The nucleus contains thread-like structures called chromosomes. Chromosomes play
an important role in the inheritance of characters. They
carry genes that help in the transfer of characters from the parents to the offspring.
Q11 ‘Cells are the basic structural units of living organisms’. Explain.
Answer. Cells constitute various components of plants and animals. A cell is the smallest unit
of life and is capable of all living functions. Cells are the building blocks of life. This is the
reason why cells are referred to as 'the basic structural and functional units of life'. All cells vary
in their shapes, sizes, and activities they perform. In fact, the shape and size of the cell is
related to the speci�c function it performs.
Q9 Explain why chloroplasts are found only in plant cells?
Answer. Chloroplasts are found only in plant cells. They contain a green pigment called
chlorophyll. This green pigment is important for photosynthesis in green plants. This
chlorophyll pigment traps solar energy and utilizes it to manufacture food for the plant.
Page 4 of 6 Aglasem Schools
Page 6
Book : Science Ncert Solutions | Chapter-8 Science
Q11 Complete the crossword with the help of clues given below
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Answer. Across
1. CHLOROPHYLL
3. ORGANELLE
6. PROTOPLASM
8. GENES
Page 5 of 6 Aglasem Schools
Q11 Complete the crossword with the help of clues given below
Across
1. This is necessary for photosynthesis.
3. Term for component present in the cytoplasm.
6. The living substance in the cell.
8. Units of inheritance present on the chromosomes.
Down
1. Green plastids.
2. Formed by collection of tissues.
4. It separates the contents of the cell from the surrounding medium.
5. Empty structure in the cytoplasm.
7. A group of cells.
Answer. Across
1. CHLOROPHYLL
3. ORGANELLE
6. PROTOPLASM
8. GENES
Page 5 of 6 Aglasem Schools
Page 7
Book : Science Ncert Solutions | Chapter-8 Science
Down
1. CHLOROPLASTS
2. ORGAN
4. MEMBRANE >br>
5. VACUOLE
Page 6 of 6 Aglasem Schools
Down
1. CHLOROPLASTS
2. ORGAN
4. MEMBRANE >br>
5. VACUOLE
Page 6 of 6 Aglasem Schools
Document Details
| Board / Org | NCERT |
| Exam | Class 8 |
| Type | Solution |
| Pages | 7 |
| Language | english |
| Updated | 30 Apr 2026 |