On this Page we have given West Bengal Class 8 English Medium Science Solution Chapter 6 Structure of Living Organism Question and Answer for our Students of West bengal Class 8 English Medium. Hope this following Question Answer will help our Students.
West Bengal Class 8 | Science | Structure of Living Organism
Q.(1) MCQ
1.)____ is the smallest unit of a living organism?
a) Tissue
b) Organ
c) Cell
d) Brick
Answer: Cell
2.) Only one of the following can move from one place to another or respond to stimuli from the environment
A) Brick
b) Tissue
c) Organ
d) Cell
Answer: Cell
3.) A piece of wood termed as non-living because
a) It cannot respond to stimuli
b) It cannot move from one place to another
c) It does not have cells
d) It does not have organs
Answer: It does not have cells
4.) Name the organ which is responsible for inhaling and exhaling air
a) Lungs
b) Heart
c) Kidneys
d) Brain
Answer: lungs
5.) It is called the structural and functional unit of the body
A) Tissue
b) Organ
c) Cell
d) Brick
Answer: Cell
6.)_______ is generally used to observe cells
a) Microscope
b) Naked eye
c) Telescope
d) Binoculars
Answer: Microscope
7.) Robert Hooke termed the chambers he observed in the cork as
a) Honeycombs
b) Cells
c) Microbes
d) Room
Answer: Cells
8.) Cells can’t be seen with the naked eye because
a) They are too small
b) They are invisible
c) They are transparent
d) They are microscopic organisms
Answer: They are too small
9.) He was the first to observe living cells for the first time
a) Robert Hooke
b) Anton van Leeuwenhoek
c) Robert Koch
d) Louis Pasteur
Answer: Anton van Leeuwenhoek
10.) Leeuwenhoek use ______ to observe cells
a) A compound light microscope
b) A dissecting microscope
c) Sunlight
d) Stains
Answer: A compound light microscope
11.) A simple light microscope different from a compound light microscope
a) It has more lenses
b) It uses sunlight for illumination
c) It can magnify the specimen more than 15-20 times
d) It is used for dissected floral parts
Answer: it has more lenses
12.) A compound light microscope uses a total of ___ lenses
a) One
b) Two
c) Three
d) Four
Answer: Three
13.) The dyes that are used for better visualization of cells called
a) Stains
b) Microbes
c) Magnifiers
d) Dissectors
Answer: Stains
14.) What can be observed using a compound microscope?
a) Internal anatomical structures of root, stem, and leaves
b) Artificial light sources
c) Cell walls, membranes, and organelles
d) Photographic films
Answer: Cell walls, membranes, and organelles
15.) It’s the type of microscope that uses high-speed electrons instead of light for transmission
A) Compound microscope
b) Reflecting microscope
c) Glass lens microscope
d) Electron microscope
Answer: Electron microscope
16.) ____ is used instead of glass lenses in an electron microscope
a) Photographic films
b) Reflectors
c) Electromagnetic lenses
d) Artificial light sources
Answer: Electromagnetic lenses
17.) The range of magnification in an electron microscope is
A) 2000-4000x
b) 50,000-300,000x
c) 15-20x
d) 500-1000x
Answer: 50,000-300,000x
18.) Which of them can be studied using an electron microscope
a) Tissue structures
b) Internal anatomical structures
c) Viruses and microbes
d) Morphological studies
Answer: Viruses and microbes
19.) How is the number of cells related to the size of an organism?
A) The larger the size, the fewer the cells
b) The larger the size, the greater the number of cells
c) Size and number of cells are unrelated
d) Smaller organisms have more cells
Answer: The larger the size, the greater the number of cells
20.) the main difference between amoeba and mosquito in terms of cellular composition is
A) Amoeba is multicellular, while mosquito is unicellular.)
b) Amoeba is unicellular, while mosquito is multicellular.)
c) Amoeba and mosquito both have the same number of cells.)
d) Amoeba and mosquito both consist of multiple organisms.)
Answer: Amoeba is unicellular, while mosquito is multicellular.)
21.) The factor which determines the shape of cells in multicellular organisms
A) Metabolic activities
b) Nature of functions
c) Size of the organism
d) Number of cells in the organism
Answer: Metabolic activities
22.) In which part of the animal body is fat stored
a) Within the nucleus of the cell
b) Underneath the skin or other organs in adipose cells
c) In rod-shaped cells in the retina
d) In cone-shaped cells in the retina
Answer: Underneath the skin or other organs in adipose cells
23.) A rod-shaped cell help us in
a) Vision in mild light
b) Colour vision in bright light
c) Storing fat
d) Assisting metabolic activities
Answer: Vision in mild light
24.) In which part of the body are cone-shaped cells present
a) Skin
b) Retina
c) Seed coat
d) Fruit coat
Answer: Retina
25.) The parts that come out from different parts of the body of Amoeba are called
A) Pseudopodia
b) Leucocytes
c) Red Blood Corpuscles
d) Nerve cells
Answer: Pseudopodia
26.) The shape of an Amoeba is
a) Circular
b) Flattened
c) Irregular
d) Star-shaped
Answer: Irregular
27.) ________ can change its shape when moving through blood vessels of different diameters
A) Erythrocyte
b) Leucocyte
c) Muscle Cell
d) Nerve cell
e) Apical cell of root and shoot
Answer: Leucocyte
28.) The unit that is used to measure the size of a cell
a) Millimeter
b) Centimeter
c) Micrometer
d) Nanometer
e) Meter
Answer: Micrometer
29.) One of the following is not a physiological function occurring in an animal body
a) Respiration
b) Circulation
c) Reproduction
d) Absorption
e) Absorption of sunlight
Answer: Absorption of sunlight
30.) These cells are columnar in shape and perform the function of absorption in the animal body
A) Nerve cells
b) Muscle cells
c) Secretory cells
d) Epithelial cells
e) Meristematic cells
Answer: Epithelial cells
31.) The collection of specialized cells are known as
a) Organs
b) Systems
c) Tissues
d) Intracellular organelles
e) Meristematic cells
Answer: Tissues
32.) The function of muscular tissue in the animal body is
a) Synthesis and storage of food
b) Conduction of water
c) Providing mechanical strength and rigidity
d) Movement and locomotion
e) Conducting impulses
Answer: Movement and locomotion
33.) What does nerve tissue do in the animal body
a) Synthesizes and stores food
b) Provides mechanical strength and rigidity
c) Conducts impulses and coordinates responses
d) Forms protective layers
e) Helps in formation of new organs
Answer: Conducts impulses and coordinates responses
34.) ____ tissue controls heartbeats, blood flow, and facial expressions in the animal body
A) Epithelial tissue
b) Meristematic tissue
c) Connective tissue
d) Nerve tissue
e) Muscular tissue
Answer: Nerve tissue
35.) The purpose of the cell membrane in an animal cell is
a) Controls various biochemical processes
b) Synthesizes ribosomes
c) Encloses the cell and regulates the entry and exit of substances
d) Stores genetic material
e) Supports the nucleus
Answer: Encloses the cell and regulates the entry and exit of substances
36.) ______ is responsible for controlling biochemical processes in a cell
A) Cell membrane
b) Cytoplasm
c) Nucleus
d) Chromatin
e) Nuclear reticulum
Answer: Nucleus
37.) Identify the structure present inside the nucleus that is composed of DNA and protein
A) Cell membrane
b) Cytoplasm
c) Nucleus
d) Chromatin
e) Nuclear reticulum
Answer: Chromatin
38.) One of the following cells do not possess a nucleus
a) Bacteria
b) Plant cells
c) Animal cells
d) Cyanobacteria
e) Prokaryotes
Answer: Bacteria
39.) It is the term used for cells that possess a nucleus with a membrane
A) Prokaryotes
b) Bacteria
c) Eukaryotes
d) Chromatin
e) Nuclear reticulum
Answer: Eukaryotes
40.) Which organelle is responsible for synthesizing ribosomes?
A) Cell membrane
b) Cytoplasm
c) Nucleus
d) Chromatin
e) Nucleolus
Answer: Nucleolus
41.) There are ____ chromosomes typically found in a human somatic cell
A) 23 chromosomes
b) 46 chromosomes
c) 64 chromosomes
d) 92 chromosomes
e) Varies depending on the individual
Answer: 46 chromosomes
42.) Which cell organelle is responsible for releasing energy by breaking down nutrients from food
a) Mitochondria
b) Endoplasmic Reticulum
c) Golgi bodies
d) Lysosomes
e) Ribosomes
Answer: Mitochondria
43.) In the cell ribosomes can be found in
a) Inside mitochondria and chloroplasts
b) Attached to the outer surface of the endoplasmic reticulum and nuclear membrane
c) Scattered in the cytoplasm
d) All of the above
e) None of the above
Answer: all of the above
44.) Identify the structure which is absent in animal cells
A) Cell membrane
b) Cell wall
c) Vacuole
d) Nucleus
e) Cytoplasm
Answer: Cell wall
45.) In which type of cell are vacuoles generally larger and singular in number
A) Animal cells
b) Bacterial cells
c) Fungal cells
d) Plant cells
e) Protozoan cells
Answer: Plant cells
46.) ______ is the term used to describe the arrangement of cytoplasm around the vacuole in plant cella
A) Cell membrane
b) Nucleus
c) Primordial utricle
d) Cell wall
Answer: Primordial utricle
47.) The shape of a plant cell depends on the volume of water inside the
A) Nucleus
b) Cytoplasm
c) Vacuole
d) Cell membrane
e) Cell wall
Answer: Vacuole
48.) The pigment which is responsible for the green color in plants
a) Xanthophyll
b) Anthocyanin
c) Carotene
d) Chlorophyll
e) Melanin
Answer: Chlorophyll
49.) Name the three types of plastids found in plant cells
a) Chloroplastids, chromoplastids, leucoplastids
b) Mitochondria, chloroplastids, chromoplastids
c) Leucoplastids, endoplasmic reticulum, vacuoles
d) Nucleus, mitochondria, chromoplastids
e) Golgi bodies, lysosomes, ribosomes
Answer: Chloroplastids, chromoplastids, leucoplastids
50.) ________is responsible for the color of flowers and fruits
A) Chloroplastids
b) Chromoplastids
c) Leucoplastids
d) Mitochondria
e) Nucleus
Answer: Chromoplastids
Q.(2) Short answer question.
(1) Which organs performing digestion of food in human body ?
→ Stomach and small intestine performing digestion of food.
(2) What is the role of lungs in our body ?
→ The role of lungs in our body is respiration by inhaling and exhaling the air.
(3) Which organ perform elimination of Waste material from the body through urine ?
→ Kidney .
(4) What is a cell ?
→ The smallest structural and functional unit of body is called as cell.
(5) Who observed living cell for the first time ?
→ In 1674, Leeuwenhoek observed the living cell for the first time.
(6) Where we can use compound microscope ?
→
- For the morphological study of bacteria fungi and viruses
- To study the cell wall cell membrane and organised present in the cell.
- To study the structure of tissues.
(7) Which lens is used in electron microscope ?
→ Electromagnetic lens is used in an electron microscope.
(8) What do you mean by unicellular and give example of one unit cellular organism. ?
→ A single cell is equivalent to hole organism is called as unicellular organism.
E.g. – amoeba
(9) What do you mean by multi cellular and give examples.
→Many cells are present in an organism called as multicellular organism.
E.g. – cat , dog etc
(10) What is the shape of red blood corpuscles ?
→ Circular and Flattened at the centre looks like a disc.
(11) What is the shape of muscle cells ?
→ Muscle cells are spindle shaped.
(12) What is the shape of nerve cell ?
→The body of nerve cell is rounded or star shaped and the branches are elongated remains attached to it.
(13) What is the shape of apical cell of root and shoot ?
→ Hexagon
(14) What do you mean by excretion ?
→ Remove of harmful metabolic Waste from the human body.
(15) What is nervous coordination ?
→Response to external stimuli and adapt to changing environment.
(16) What is the function of meristematic tissue ?
→
- Formation of new organ
- Increase the length of root and shoot
(17) Write the functions of permanent tissues ?
→
- Storage of waste
- Conduction of water
- Providing mechanical strength.
(18) Write the functions of epithelial tissues ?
→
- Protective layer formation over the body and over the organs.
- Absorption
- Secretion
(19) What are the functions of connective tissues ?
→
- Provide mechanical strength and provide framework.
- Connect internal organs
- Controls body temperature
(20) Write the function of nerve tissue?
→
- Receiving stimulus
- Conduct impulse
(21) What is a cytoplasm ?
→Cytoplasm is semi-liquid jelly like substance present inside the cell membrane in which other cell organelles are remain floating in it.
(22) Where the DNA and RNA located inside the cell ?
→The chromatin fibres of DNA and RNA present inside the nucleus of the cell.
(23) What is chromosome ?
→The coiled structure of DNA and protein is called as chromosome.
(24) What are the genes ?
→Each of the specific part of the DNA called as genes. Characters from parents to offspring transmitted through genes.
(25) What is nucleolus ?
→ The rounded dense structure present inside the nucleus of the cell where ribosomes are synthesized called as nucleolus.
(26) Do all cells have nucleus ?
→Bacteria do not possess nucleus.
(27) What do you mean by prokaryotes ?
→ Cells like bacteria , cyanobacteria possess nucleus without nuclear membrane called as prokaryotes.
(28) What do you mean by eukaryotes ?
→Many cells of plants and animals possess nucleus with membrane and nuclear reticulum called as eukaryotes.
(29) What are mitochondria ?
→Mitochondria is double membrane bound cell organelle which releases energy by breaking the nutrients of food.
(30) What is the function of endoplasmic reticulum ?
→ Synthesis of proteins.