WBBSE Solutions For Class 8 School Science Chapter 6 The Structure of Living Organisms Review Questions

Chapter 6 The Structure Of Living Organisms Review Questions MCQs

 

Question 1. Which one of the following is non-living

  1. Mimosa plant
  2. House fly
  3. Wooden log
  4. Bacteria

Answer: 3. Wooden log

Question 2. Though non-living, it is produced from a living organism

  1. Stone,
  2. Wooden chair
  3. Coal
  4. Brick

Answer: 1. Stone,

Question 3. As a ‘brick is to a house/ similar is

  1. Cell to a living body
  2. Stomach to intestine
  3. Eye to brain
  4. Organ to tissue

Answer: 1. Cell to a living body

Question 4. The structural unit of our body is

  1. Brick
  2. Cell
  3. Lung
  4. Organ

Answer: 2. Organ

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Question 5. Lysosome arises from

  1. Endoplasmic reticulum
  2. Nucleus
  3. Mitochondria
  4. Golgi apparatus

Answer: 4. Golgi apparatus

Question 6. The term cell was coined by

  1. Robert Hooke
  2. Darwin
  3. Franklin
  4. C. Golgi

Answer: 1. Robert Hooke

Question 7. Which one is not a light microscope?

  1. Simple microscope,
  2. Compound microscope,
  3. Electron microscope
  4. None of these

Answer: 3. Electron microscope

Question 8. Unicellular organism is

  1. Amoeba
  2. Leucocyte
  3. Mosquito
  4. Hydra

Answer: 1. Amoeba

Question 9. Muscle cells of our body are

  1. Round shaped
  2. Star-shaped
  3. Spindle-shaped
  4. Spiral shaped

Answer: 3. Spindle-shaped

Question 10. Nerve cells can

  1. Carry oxygen
  2. Receive environmental stimulation
  3. Contract and relax
  4. Undergo cell division

Answer: 2. Receive environmental stimulation

Question 11. Cells are generally measured by unit

  1. Nanometre
  2. Metre
  3. Millimetre
  4. None of these

Answer: 1. Nanometre

Question 12. Chlorophyll is present in

  1. Stroma
  2. Cristae
  3. Quantosome
  4. Grana

Answer: 4. Grana

Question 13. In plants, new organs are formed from

  1. Connective tissue
  2. Permanent tissue
  3. Meristematic tissue
  4. None of these

Answer: 3. Meristematic tissue

Question 14. An outer protective layer of our body contains

  1. Epithelial tissue
  2. Muscular tissue
  3. Connective tissue
  4. Skeletal tissue

Answer: 1. Epithelial tissue

Question 15. Centrosomes are present in

  1. Prokaryotes
  2. Animal cells
  3. Plant cells
  4. Viruses

Answer: 2. Animal cells

Question 16. Animal cells do not contain

  1. Plastids
  2. Mitochondria
  3. Nucleus
  4. Vacuoles

Answer: 1. Plastids

Question 17. Generally, the largest vacuoles are found in

  1. Animal cells
  2. Nerve cells
  3. Plant cells
  4. None of these

Answer: 3. Plant cells

Question 18. Nucleic acids are not found within

  1. Cell membrane
  2. Mitochondria
  3. Plastids
  4. All of these

Answer: 1. Cell membrane

Question 19. Double membrane-bound cell organelles are

  1. Mitochondria
  2. Golgi bodies
  3. Ribosomes
  4. Lysosomes

Answer: 1. Mitochondria

Question 20. Membraneless cell organelles are

  1. Golgi bodies
  2. Ribosomes
  3. Plastids
  4. Nucleus

Answer: 2. Ribosomes

Question 21. Cell organelles associated with secretion are

  1. Mitochondria
  2. Vacuoles
  3. Golgi bodies
  4. Cell wall

Answer: 3. Golgi bodies

Question 22. A dry and hot environment is found in

  1. Desert region
  2. Polar region
  3. Aquatic region
  4. Marshy region

Answer: 1. Desert region

Question 23. Animals living in very dry and cold environments have

  1. Antifreeze protein
  2. Vacuoles
  3. Mesosomes
  4. Streamlined body

Answer: 1. Antifreeze protein

Question 24. The number of RBCs increases in

  1. High altitude
  2. Low altitude
  3. Desert environment
  4. Forest environment

Answer: 1. High altitude

Question 25. The part of protoplasm inside the nucleus is known as

  1. Endoplasm
  2. Nucleoplasm,
  3. Cytoplasm
  4. Ectoplasm

Answer: 1. Endoplasm

Question 26. The parenchyma cells filled with air vacuoles are known as

  1. Sclerenchyma,
  2. Collenchyma
  3. Aerenchyma
  4. Mesenchyma

Answer: 3. Aerenchyma

Question 27. Two autonomous cell organelles are

  1. Mitochondria and chloroplastid
  2. Mitochondria and golgi bodies
  3. Plastid and centriole
  4. Cell membrane and cell wall

Answer: 1. Mitochondria and chloroplastid

Question 28. Which type of microscope is used for observing two sections of root, stem and leaf?

  1. Simple light microscope
  2. Compound light microscope
  3. Electron microscope
  4. All of these

Answer: 2. Compound light microscope

Question 29. Rod-like cells are found in our

  1. Retina of eye
  2. Cornea of eye
  3. Lung
  4. Brain

Answer: 1. Retina of the eye

Question 30. The longest cell in our body is

  1. White blood corpuscles
  2. Ovum
  3. Nerve cell
  4. Liver cells

Answer: 3. Nerve cell

Question 31. The cell organelle which directly helps in protein synthesis is

  1. Ribosome
  2. Nucleus
  3. Endoplasmic reticulum
  4. Mesosome

Answer: 1. Ribosome

Question 32. The brain of a cell is

  1. Nucleus
  2. Mitochondria
  3. Lysosome
  4. Vacuoles

Answer: 1. Nucleus

Question 33. Which organelle may be considered a suicide bag?

  1. Ribosome
  2. Mitochondria
  3. Golgi bodies
  4. Lysosome

Answer: 4. Lysosome

Question 34. The powerhouse of the cell is

  1. Nucleus
  2. Mitochondria
  3. Vacuole
  4. Ribosome

Answer: 2. Mitochondria

Question 35. An electron microscope uses

  1. Magnetic ocular lens
  2. Objective lens
  3. Photographic film
  4. Simple lens

Answer: 1. Magnetic ocular lens

Question 36. Hereditary characteristics are stored in

  1. Nucleic acid
  2. Protein
  3. Atp
  4. Cytosol

Answer: 1. Nucleic acid

Question 37. Grana is found within

  1. Chloroplastid
  2. Ribosomes
  3. Nucleus
  4. Centrosome

Answer: 1. Chloroplastid

Question 38. Bacterial cells perform respiration by

  1. Plastid
  2. Mitochondria
  3. Mesosome
  4. None of these

Answer: 3. Mesosome

Question 39. Cactuses are adapted for

  1. Aquatic environment
  2. Desert
  3. Hills
  4. Saline rich marshes

Answer: 2. Desert

Question 40. Coloured petals contain

  1. Chloroplastid,
  2. Chromoplastid
  3. Leucoplastid
  4. All of these

Answer: 2. Chromoplastid

Question 41. Increase of activity of which of the following cell organelle leads to cancer?

  1. Mitochondria
  2. Golgi body
  3. Ribosome
  4. Lysosome

Answer: 4. Lysosome

Question 42. The undefined nuclear region of prokaryotes is also known as

  1. Nucleus
  2. Nucleolus
  3. Nucleic acid
  4. Nucleoid

Answer: 4. Nucleoid

Question 43. Which of the following is not a function of the vacuole?

  1. Storage
  2. Providing turgidity and rigidity to the cell
  3. Locomotion
  4. Waste excretion

Answer: 3. Locomotion

Question 44. Antifreeze proteins are found in

  1. Kangaroo
  2. Piranha
  3. Polar fish
  4. Deer

Answer: 3. Polar fish

 

Chapter 6 The Structure Of Living Organisms Fill In The Blanks

 

Question 1. Bacteria are __________ cells.
Answer: Prokaryotic

Question 2. Protoplasm is made up of nucleoplasm and __________
Answer: Cytoplasm

Question 3. __________ causes the colour of a flower.
Answer: Chromoplastid

Question 4. The cell membrane is __________ but the cell wall is
Answer: Living, dead

Question 5. The nucleus of bacteria is known as __________.
Answer: Nucleoid

Question 6. Plastids are present only in __________ cells.
Answer: Plant

Question 7. Cristae are found within __________.
Answer: Mitochondria

Question 8. __________ is a cell organelle without a membrane.
Answer: Ribosome

Question 9. The plastids present in the root are __________.
Answer: Leucoplastic

Question 10. The dense round dots within the nucleus are known as __________.
Answer: Nucleolus

Question 11. __________ contain chlorophyll pigment.
Answer: Chloroplastid

Question 12. Autolysis of a cell is performed by __________.
Answer: Lysosome

Question 13. The secretory activity of a cell is performed by __________
Answer: Golgi bodies

Question 14. __________ are considered units of a living body.
Answer: Cells

Question 15. Blood is a liquid __________ tissue.
Answer: Connective

Question 16. Root tips contain __________ tissue.
Answer: Meristematic

Question 17. Adipose tissue cells store __________
Answer: Fat

Question 18. The network-like structure within the nucleus is known as nuclear.
Answer: Reticulum

Question 19. Sulphur bacteria can survive in temperature.
Answer: High

Question 20. Haemoglobin is present within our blood corpuscles.
Answer: Red

Question 21. Huge calcium is found in the cells of.
Answer: Bones

Question 22. Salt-storing cells are found in plants growing in water.
Answer: Saline

Question 23. proteins prevent ice formation within the cytoplasm.
Answer: Antifreeze

Question 24. substitute mitochondria in bacteria.
Answer: Masosome

Question 25. An environment with high pressure is found in the sea.
Answer: Deep

Question 26. Primordial utricle is found in cell.
Answer: Plant

Question 27. Four types of animal tissues are epithelial, nervous and connective.
Answer: Muscular

Question 28. The majority of cells are 5 to 10 in size.
Answer: micron

Question 29. The kidney helps in the elimination of waste.
Answer: Metabolic

Question 30. Cells can be observed under
Answer: Microscope

 

Chapter 6 The Structure Of Living Organisms Identify As ‘True’ Or ‘False’

 

Question 1. The lung is associated with blood circulation.
Answer: False

Question 2. The heart is a blood circulation organ.
Answer: True

Question 3. A cell is the unit of a living body.
Answer: True

Question 4. Leeuwenhoek observed dead cork cells.
Answer: False

Question 5. Simple light microscopes have magnifications of about 2000X.
Answer: False

Question 6. In the electron microscope, visible light is the source of illumination.
Answer: False

Question 7. Elephants and Amoeba are multicellular organisms.
Answer: False

Question 8. Fat is stored beneath our skin.
Answer: True

Question 9. Leucocytes can change their shape.
Answer: True

Question 10. Muscle cells are generally star-shaped.
Answer: False

Question 11. The nerve cell is the longest cell in the human body.
Answer: True

Question 12. A small single visible dot may contain hundreds of cells.
Answer: True

Question 13. Permanent tissue provides mechanical strength to plants.
Answer: True

Question 14. Cells can be stained by fountain pen ink.
Answer: False

Question 15. Centrosomes lack membranes.
Answer: True

Question 16. DNA is found inside Golgi bodies.
Answer: False

Question 17. All endoplasmic reticulums are smooth in outline.
Answer: False

Question 18. – Ribosomes are covered by a double membrane.
Answer: False

Question 19. The cell wall is porous.
Answer: True

Question 20. A saline environment is found in estuaries.
Answer: True

Question 21. Cacti can grow in the desert
Answer: True

Question 22. At high altitudes, the number of RBCs in the blood decreases.
Answer: False

Question 23. Microbes are visible under the naked eye.
Answer: True

Question 24. Stages of body organization are: cell tissue -> organ -» system
Answer: True

Question 25. Mitochondria is absent in bacteria.
Answer: True

 

Chapter 6 The Structure Of Living Organisms Match The Columns

 

1.

Column – A Column – B
A. Stomach 1. Circulation
B. Lung 2. Excretion
C. Heart 3. Digestion
D. Kidney 4. Respiration

Answer: A-3, B-4,C-1,D-2

2.

Column – A Column – B
A. Epithelial tissue 1. Mechanical strength and framework
B. Connective tissue 2. Conduction of impulse
C. Muscular tissue 3. Outer covering
D. Nervous tissue 4. Contraction-

Answer: A-3, B-1,C-4,D-2

3.

Column – A Column – B
A. Mitochondria 1. Protein synthesis
B. Golgi Body 2. Secretion
C. Lysosome 3. Energy production
D. Ribosome 4. Cellular destruction

Answer: A-3, B-2,C-4,D-1

4.

Column – A Column – B
A. Dry and very hot 1. Polar region
B. Dry and very cold 2. Pond, River
C. Aquatic 3. Ocean, Estuaries
D. Saline 4. Desert region

Answer: A-4, B-1,C-2,D-3

5.

Column – A Column – B
A. Antifreeze protein 1. Floating
B. Aerenchyma 2. Prevent ice formation
C. Mesosome 3. Sulphur bacteria
D. High temperature 4. Respiration

Answer: A-2, B-1,C-4,D-3

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