Students can download 6th Science Term 2 Chapter 5 The Cell Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 2 Chapter 5 The Cell

Samacheer Kalvi 6th Science The Cell Text Book Back Questions and Answers

I. Choose the correct answer:

Question 1.
The unit of measurement used for expressing dimension (size) of cell is
(a) centimeter
(b) millimeter
(c) micrometer
(d) meter
Answer:
(c) micrometer

Question 2.
Under the microscope, Priya observes a cell that has a cell wall and a distinct nucleus. The cell that she observed is
(a) a plant cell
(b) an animal cell
(c) a nerve cell
(d) a bacteria cell
Answer:
(d) a bacteria cell

Question 3.
A ‘control centre’ of the eukaryotic cell is
(a) Cell wall
(b) Nucleus
(c) Vacuoles
(d) Chloroplast
Answer:
(b) Nucleus

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

Question 4.
Which one of the following is not a unicellular organism?
(a) Yeast
(b) Amoeba
(c) Spirogyra
(d) Bacteria
Answer:
(c) Spirogyra

Question 5.
Most organelles in a eukaryotic cell are found in the
(a) Cell wall
(b) cytoplasm
(c) nucleus
(d) Vacuole
Answer:
(b) cytoplasm

II. Fill in the Blanks

  1. The instrument used to observe the cell is ………..
  2. I control the food production of a cell. Who am I? ………..
  3. I am like a policeman. Who am I ………?
  4. The Term “cell” was coined by ………..
  5. The egg of an Ostrich is the ……….. single cell.

Answer:

  1. Microscope
  2. Chloroplast
  3. Cell membrane
  4. Robert Hooke
  5. Largest

III. True or False. If False, give the correct answer.

  1. A cell is the smallest unit of life.
  2. Nerve cell is the longest cell
  3. Prokaryotes were the first form of life on earth.
  4. The organelles of both plants and animals are made up of cells. (Organelles – Found inside the cell)
  5. New cells are produced from existing cells.

Answer:

  1. True
  2. True
  3. True
  4. False
  5. True

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

IV. Match the following

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 1
Answer:
1. – c
2. – d
3. – e
4. – a
5. – b

V. Arrange in a correct sequence

Question 1.
Elephant, Cow, Bacteria, Mango, Rose plant.
Answer:
Bacteria, Mango, Rose plant, Cow, Elephant.

Question 2.
Hen Egg, Ostrich egg, Insect egg.
Answer:
Insect egg, Hen egg, Ostrich egg

VI. Analogy

  1. Prokaryote : Bacteria :: Eukaryote : ………..
  2. Spirogyra : Plant cell :: Amoeba : ………….
  3. Food producer : Chloroplasts :: Power house : …………

Answer:

  1. Plants, Animals
  2. Animal cell
  3. Mitochondria

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

VII. Give a Very short answer:

Question 1.
Who discovered the cell in 1665?
Answer:
The English scientist Robert Hooke discovered the cell in 1665 from cork slices kept under a microscope.

Question 2.
What type of cells do we have?
Answer:
We have a Eukaryotic type of cells.

Question 3.
What are the essential components of a cell?
Answer:
A typical cell consists of three major parts.

  1. An outer cell membrane
  2. A liquid cytoplasm
  3. Nucleus

Question 4.
What are the organelles found only in plant cells?
Answer:

  1. Cell wall
  2. Chloroplast

Question 5.
Give any three examples of eukaryotic cells.
Answer:

  1. Plant cells
  2. Animal cells
  3. Most of fungi and Algae

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

Question 6.
Which one is called as “Area of movement”?
Answer:
The cytoplasm is a watery, gel-like material in which cell parts move. So it is known as an “Area of movement”.

Question 7.
Shiva said, “Bigger onion has larger cells when compared to the cells of the smaller onion”! Do you agree with his statement or not? Explain why?
Answer:
No, the big onion and small onion both of them have plant cell and the size of every cell remains the same whether it is of a small onion or big one. The shape is larger means that the number of cells is more in bigger onion.

VIII. Give a short answer:

Question 1.
Why cells are called building blocks of life?
Answer:
A brick is a basic building block of a wall, likewise, the cells are the basic structural and functional unit of every living organism. So the cells are called as building blocks of life.

Question 2.
Identify any four parts of the plant cell?
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 2
Answer:
A – Cell Wall,
B – Cytoplasm,
C – Nucleus,
D – Mitochondria

Question 3.
Distinguish between prokaryotic and eukaryotic cells
Answer:
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 3

Question 4.
Make sketches of animal and plant cells which you observe under the microscope.
Answer:
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 4
Cell Wall & Chloroplasts – Absent in Animal Cells
Centrioles – Absent in Plant Cells

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

Question 5.
Write about the contribution of Robert Hooke in cell biology
Answer:
Robert Hooke was a scientist and inventor. He improved the microscope and built a compound microscope. One day he made thin sections of the cork and observed many small identical chambers through his microscope. They were hexagonal in shape. Based on these observations Hooke published a book named Micrographia in the year 1665, where he first used the term Cell. He describes the structure of tissue using the term cell.

IX. Answer in detail:

Question 1.
Tabulate any five cell organelles and their function.
Answer:
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 5

Question 2.
Draw a neat labelled diagram of a prokaryotic cell.
Answer:
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 6

X. Project (For Students)

Question 1.
Use your imagination and create a 3-D model of a plant cell?

Question 2.
You can use numerous food materials such as jelly and some cake to make a cell body. Cell organelles can be made using nuts and dry fruits. You can display the model in your classroom and invite teachers or students from other classes to rise questions on the project and try to give answers.

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

Samacheer Kalvi 6th Science The Cell Additional Important Questions and Answers

I. Choose the right answer:

Question 1.
The first cell formed in the earth
(a) Eukaryotic cell
(b) Algal cell
(c) Fungal cell
(d) Prokaryotic cell
Answer:
(d) Prokaryotic cell

Question 2.
Robert Hooke published a book named ______ in the year 1665.
(a) Cellula
(b) Micrographia
(c) Cell biology
(d) Organelles
Answer:
(b) Micrographia

Question 3.
The pigment present in leaf to absorb light is
(a) chlorophyll
(b) chloroplast
(c) chromoplast
(d) leucoplast
Answer:
(a) chlorophyll

Question 4.
The largest cell is the egg of an ______ with 170-millimeter width.
(a) Ostrich
(b) viper
(c) tortoise
(d) Hen
Answer:
(a) Ostrich

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

II. Assertion and Reason

Question 1.
Assertion (A) : Chloroplast is a cell organelle
Reason (R) : An organelle is a distinct part of the cell which has a particular structure and Function.
(a) Assertion (A) and Reason R – True and R is the correct explanation of A
(b) Both A and R – true but R is not the correct explanation of A
(c) A True but R False
(d) A False but R True
Answer:
(a) Assertion (A) and Reason R – True and R is the correct explanation of A

Question 2.
Assertion (A) : Mitochondria is an important organ cell of the cell
Reason (R) : Mitochondria is involved in food preparation
(a) Assertion (A) and Reason R – True and R is the correct explanation of A
(b) Both A and R – true but R is not the correct explanation of A
(c) A True but R False
(d) A False but R True
Answer:
(c) A True but R False

III. Match the Following:

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 7
Answer:
1. – B
2. – D
3. – E
4. – C

IV. Very Short Answer:

Question 1.
Arrange the following cells in the order of their size.
(a) Bacteria cell
(b) Frogs egg
(c) Hen’s egg
(d) Human egg.
Answer:
(a) Bacterial cell
(b) Human egg
(c) Frogs egg
(d) Hen’s egg

Question 2.
How do you distinguish between living and dead cells?
Answer:
Living cells have a nucleus (Eg.) Onion peel cells.
Non-Living cells don’t have a nucleus (Eg.) Cork ceils.

Question 3.
Name the largest Angiosperm cell
Answer:
The largest Angiosperm cell is citrus reticulata (clearly visible in orange pulp) & citrus maxima.

Question 4.
Name the organelle without membrane.
Answer:
Ribosomes are the cell organelle in which the membrane is absent.

Question 5.
Identify the following diagram and label A, B, C, D
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 8
Answer:
The diagram is the structure of the chloroplast
A – outer membrane
B – inner membrane
C – Thylakoid
D – stroma

Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell

Question 6.
Identify the following diagram and label A, B, C
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 9
Answer:
A – Outer Membrane
B – Cristae
C – Matrix

Question 7.
Identify the following diagram and label A, B, C
Samacheer Kalvi 6th Science Guide Term 2 Chapter 5 The Cell 10
Answer:
Structure of Nucleus
A – Nuclear membrane
B – Nuclear pore
C – Nucleolus
D – Chromatin reticulum