NCERT Solutions For Class 12 Chemistry Chapter 14: Biomolecules

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NCERT Solutions for class 12 Chemistry Chapter 14 Biomolecules deals with the four major types of biomolecules that are carbohydrates, lipids, nucleic acids, and Proteins and explains topics such as saccharides, glycogen, cellulose, starch and more. Some of the important topics of Biomolecules chapter include:

  1. Enzymes
  2. Hormones
  3. Amylose
  4. Glutamic acid
  5. Glycogen
  6. Glycosaminoglycans
  7. Monosodium glutamate
  8. Biochemistry
  9. Cysteine

Expected no. of questions: 3 to 4 questions of total 7 marks

Download PDF: NCERT Solutions for Class 12 Chemistry Chapter 14 pdf


NCERT Solutions for Class 12 Chemistry Chapter 14

NCERT Solutions for Class 12 Chemistry Chapter 14 is given below.

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Class 12 Chemistry Chapter 14 Biomolecules – Important Topics

Biomolecules forms a part of Biochemistry which deals with chemical processes relating to all living organisms. Some of the important Biomolecules essential for the survival of living organisms include:

  • Carbohydrates: Carbohydrates are macronutrients and one of the three primary sources of nutrition for our bodies. It consists of Carbo, hydrogen and oxygen as its constituent particles.
  • Proteins: Proteins are the building blocks of life and form 60% of dry cells in the body and form the fundamental basis of the structure and functions of life. Proteins are made up of amino acids.
  • Enzymes: Enzymes are catalysts of biological systems. All enzymes are proteins, except for a small group of catalytically active RNA molecules or ribozymes.
  • Vitamins: Vitamins are natural and essential nutrients, which play a major role in the growth and development of the human body. These are divided into Water-soluble and Fat-soluble vitamins.
  • Nucleic Acid: Nucleic acids are long-chain polymeric molecules. The two main nucleic acids are DNA and RNA which are responsible for inheritance and gene transfer.
  • Hormones: Hormones are our body’s chemical messengers which are released in one tissue and to one or other tissues through the circulatory system. They are responsible for many bodily functions.

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CBSE CLASS XII Related Questions

  • 1.
    On hydrolysis, which of the following carbohydrates gives only $\mathrm{\beta}$-glucose ?

      • Starch
      • Sucrose
      • Maltose
      • Cellulose

    • 2.
      Why are magnesium blocks attached to iron water pipelines?


        • 3.
          Write mechanism of acid dehydration of ethanol to ethene.


            • 4.
              What happens when: (a) Propanenitrile is treated with phenyl magnesium bromide followed by hydrolysis? (b) p-Fluorotoluene is treated with $CrO_3$ in presence of acetic anhydride followed by hydrolysis with aqueous acid? (c) Phthalic acid is treated with $NH_3$ followed by heating?


                • 5.
                  Though chlorine shows strong $-I$ effect, why is it ortho/para directing?


                    • 6.
                      61 g benzoic acid (M = 122 g mol$^{-1}$) dissolved in 500 g benzene. Vapour pressure of pure benzene = 66 torr. Assume complete dimerisation. Calculate vapour pressure of solution.

                        CBSE CLASS XII Previous Year Papers

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