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.
    Write the anode and cathode reactions and the overall cell reaction occurring in a lead storage battery during its use.


      • 2.
        Which of the following statements is not true about glucose?

          • It is an aldose.
          • On heating with HI it forms n-hexane.
          • It exists in furanose form.
          • It does not give Schiff's test.

        • 3.
          A compound (A) with molecular formula \( \text{C}_4\text{H}_9\text{I} \), which is a primary alkyl halide, reacts with alcoholic KOH to give compound (B). Compound (B) reacts with HI to give (C) which is an isomer of (A). When (A) reacts with Na metal in the presence of dry ether, it gives a compound (D), \( \text{C}_8\text{H}_{18} \), which is different from the compound formed when n-butyl iodide reacts with sodium. Write the structures of (A), (B), (C) and (D). Write the chemical equation when compound (A) is reacted with alcoholic KOH.


            • 4.
              Calculate the potential for half-cell containing 0.01 M K\(_2\)Cr\(_2\)O\(_7\)(aq), 0.01 M Cr\(^{3+}\)(aq), and 1.0 x 10\(^{-4}\) M H\(^+\)(aq).


                • 5.
                  In case of association, abnormal molar mass of solute will:

                    • decrease
                    • increase
                    • remain same
                    • first increase and then decrease

                  • 6.
                    Shweta mixed two liquids A and B of 10 mL each. After mixing, the volume of the solution was found to be 20.2 mL.
                    (i) Why was there a volume change after mixing the liquids?
                    (ii) Will there be an increase or decrease of temperature after mixing?
                    (iii) Give one example for this type of solution.

                      CBSE CLASS XII Previous Year Papers

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