What is the cell wall of a plant made of ?

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SSC JE CE Previous Year Paper 8 (Held on 29 Oct 2020 Morning)
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  1. Cellulose
  2. Carbohydrates
  3. Lipids
  4. Lipoprotein

Answer (Detailed Solution Below)

Option 1 : Cellulose
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Detailed Solution

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The correct answer is Cellulose.

  • Plant cell walls are primarily made of cellulose.

Key Points

  • Cellulose is the most abundant macromolecule on Earth.
    • Cellulose fibers are long, linear polymers of hundreds of glucose molecules.
    • These fibres aggregate into bundles of about 40, which are called microfibrils.

Additional Information

  • Carbohydrates are the sugars, starches, and fibres found in fruits, grains, vegetables, and milk products.
    • A carbohydrate is a biomolecule consisting of carbon (C), hydrogen (H), and oxygen (O) atoms.
  • Lipids are molecules that contain hydrocarbons and make up the building blocks of the structure and function of living cells.
    • A lipid is a biomolecule that is soluble in nonpolar solvents.
  • A lipoprotein is a biochemical assembly whose primary function is to transport hydrophobic lipid also known as fat molecules in water, as in blood plasma or other extracellular fluids.
    • It consists of a Triglyceride and Cholesterol centre, surrounded by a phospholipid outer shell, with the hydrophilic portions oriented outward towards the surrounding water and lipophilic portions oriented inward toward the lipid centre.
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