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:

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.

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 product when
reacts with Zn(Hg)/conc. HCl.

View Solution

2.
Write the ionic equations for the oxidizing action of $\mathrm{MnO_4^-}$ in acidic medium for :
(I) $\mathrm{Fe^{2+}}$ ion
(II) $\mathrm{C_2O_4^{2-}}$ ion

View Solution

3.
Alcohols, phenols and ethers are oxygen-containing organic compounds. Primary alcohols yield aldehydes with mild oxidising agents and carboxylic acids with strong oxidizing agents. Secondary alcohols yield ketones on oxidation while tertiary alcohols are resistant to oxidation. Ethers may be prepared by dehydration of alcohols and Williamson synthesis. The C – O bond in ethers can be cleaved by hydrogen halides. The presence of – OH group in phenols activates the aromatic ring towards electrophilic substitution and directs the incoming group to ortho and para positions due to resonance effect. In presence of NaOH, phenol generates phenoxide ion which is even more reactive than phenol. Thus, in alkaline medium, phenol undergoes Kolbe's reaction.

4.
The conductivity of 0·001 M acetic acid is $\mathrm{3.905\times10^{-5}}$ S $\mathrm{cm^{-1}}$. Calculate its molar conductivity and degree of dissociation $\mathrm{(\alpha)}$. [Given : $\mathrm{\lambda^\circ_{CH_3COO^-} = 40.9}$, $\mathrm{\lambda^\circ_{H^+} = 349.6\ S\,cm^2\,mol^{-1}}$]

View Solution

5.
Equilibrium constant $\mathrm{(K_c)}$ is related to $\mathrm{E^\circ_{cell}}$, but not to $\mathrm{E_{cell}}$. Why ?

View Solution

6.
Living systems are made up of various complex biomolecules like carbohydrates, proteins, nucleic acids, lipids, etc. Proteins and carbohydrates are essential constituents of our food. In addition, some simple molecules like vitamins and mineral salts also play an important role in the functions of organisms. All proteins are polymers of $\mathrm{\alpha}$-amino acids. Proteins can be classified into two types on the basis of their molecular shape — Fibrous and Globular proteins. Vitamins are accessory food factors required in the diet. They are classified as fat-soluble and water-soluble. Deficiency of vitamins leads to many diseases. Nucleic acids are the polymers of nucleotides which in turn consist of a base, a pentose sugar and phosphate moiety. There are two types of nucleic acids — DNA and RNA. Nucleic acids are responsible for the transfer of characters from parents to offsprings.

NCERT Solutions For Class 12 Chemistry Chapter 14: Biomolecules

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

NCERT Solutions for Class 12 Chemistry Chapter 14

Class 12 Chemistry Chapter 14 Biomolecules – Important Topics

CBSE CLASS XII Related Questions

1.
Write the product when
reacts with Zn(Hg)/conc. HCl.

2.
Write the ionic equations for the oxidizing action of $\mathrm{MnO_4^-}$ in acidic medium for :
(I) $\mathrm{Fe^{2+}}$ ion
(II) $\mathrm{C_2O_4^{2-}}$ ion

4.
The conductivity of 0·001 M acetic acid is $\mathrm{3.905\times10^{-5}}$ S $\mathrm{cm^{-1}}$. Calculate its molar conductivity and degree of dissociation $\mathrm{(\alpha)}$. [Given : $\mathrm{\lambda^\circ_{CH_3COO^-} = 40.9}$, $\mathrm{\lambda^\circ_{H^+} = 349.6\ S\,cm^2\,mol^{-1}}$]

5.
Equilibrium constant $\mathrm{(K_c)}$ is related to $\mathrm{E^\circ_{cell}}$, but not to $\mathrm{E_{cell}}$. Why ?

Similar Chemistry Concepts

Comments

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NCERT Solutions For Class 12 Chemistry Chapter 14: Biomolecules

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

NCERT Solutions for Class 12 Chemistry Chapter 14

Class 12 Chemistry Chapter 14 Biomolecules – Important Topics

CBSE CLASS XII Related Questions

1.Write the product when reacts with Zn(Hg)/conc. HCl.

2.Write the ionic equations for the oxidizing action of $\mathrm{MnO_4^-}$ in acidic medium for :(I) $\mathrm{Fe^{2+}}$ ion(II) $\mathrm{C_2O_4^{2-}}$ ion

4.The conductivity of 0·001 M acetic acid is $\mathrm{3.905\times10^{-5}}$ S $\mathrm{cm^{-1}}$. Calculate its molar conductivity and degree of dissociation $\mathrm{(\alpha)}$. [Given : $\mathrm{\lambda^\circ_{CH_3COO^-} = 40.9}$, $\mathrm{\lambda^\circ_{H^+} = 349.6\ S\,cm^2\,mol^{-1}}$]

5.Equilibrium constant $\mathrm{(K_c)}$ is related to $\mathrm{E^\circ_{cell}}$, but not to $\mathrm{E_{cell}}$. Why ?

Similar Chemistry Concepts

Comments

SUBSCRIBE TO OUR NEWS LETTER

1.
Write the product when
reacts with Zn(Hg)/conc. HCl.

2.
Write the ionic equations for the oxidizing action of $\mathrm{MnO_4^-}$ in acidic medium for :
(I) $\mathrm{Fe^{2+}}$ ion
(II) $\mathrm{C_2O_4^{2-}}$ ion

4.
The conductivity of 0·001 M acetic acid is $\mathrm{3.905\times10^{-5}}$ S $\mathrm{cm^{-1}}$. Calculate its molar conductivity and degree of dissociation $\mathrm{(\alpha)}$. [Given : $\mathrm{\lambda^\circ_{CH_3COO^-} = 40.9}$, $\mathrm{\lambda^\circ_{H^+} = 349.6\ S\,cm^2\,mol^{-1}}$]

5.
Equilibrium constant $\mathrm{(K_c)}$ is related to $\mathrm{E^\circ_{cell}}$, but not to $\mathrm{E_{cell}}$. Why ?