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NCERT solutions Chemistry Textbook for Class 12 Part 2 chapter 5 Biomolecules

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Chapter 5 - Biomolecules

Pages 412 - 422

Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain.

Q 1 | Page 412 | view solution

What are the expected products of hydrolysis of lactose?

Q 2 | Page 412 | view solution

How do you explain the absence of aldehyde group in the pentaacetate of D-glucose?

Q 3 | Page 412 | view solution

The melting points and solubility in water of amino acids are generally higher than that of the corresponding halo acids. Explain.

Q 4 | Page 417 | view solution

Where does the water present in the egg go after boiling the egg?

Q 5 | Page 417 | view solution

Why Vitamin C cannot be stored in our body ?

Q 6 | Page 422 | view solution

What products would be formed when a nucleotide from DNA containing thymine is hydrolysed?

Q 7 | Page 422 | view solution

When RNA is hydrolysed, there is no relationship among the quantities of different bases obtained. What does this fact suggest about the structure of RNA?

Q 8 | Page 422 | view solution

Page 423

What are monosaccharides?

Q 1 | Page 423 | view solution

What are reducing sugars?

Q 2 | Page 423 | view solution

Write two main functions of carbohydrates in plants.

Q 3 | Page 423 | view solution

Classify the following into monosaccharides and disaccharides.

Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose

Q 4 | Page 423 | view solution

Define the following terms:

Glycosidic linkage

Q 5 | Page 423 | view solution

What is glycogen? How is it different from starch?

Q 6 | Page 423 | view solution

What are the hydrolysis products of sucrose 

Q 7.1 | Page 423 | view solution

What are the hydrolysis products of lactose?

Q 7.2 | Page 423 | view solution

What is the basic structural difference between starch and cellulose?

Q 8 | Page 423 | view solution

What happens when D-glucose is treated with the following reagents?

(i) HI (ii) Bromine water (iii) HNO3

Q 9 | Page 423 | view solution

Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.

Q 10 | Page 423 | view solution

What are essential and non-essential amino acids? Give two examples of each type.

Q 11 | Page 423 | view solution

Define the following as related to proteins 

Peptide linkage

Q 12.1 | Page 423 | view solution

Define the following terms as related to proteins :

Primary structure

Q 12.2 | Page 423 | view solution

Define the following terms as related to proteins:

Denaturation

Q 12.3 | Page 423 | view solution

What are the common types of secondary structure of proteins?

Q 13 | Page 423 | view solution

What type of bonding helps in stabilising the ∝-helix structure of proteins?

Q 14 | Page 423 | view solution

Differentiate between globular and fibrous proteins.

Q 15 | Page 423 | view solution

How do you explain the amphoteric behaviour of amino acids?

Q 16 | Page 423 | view solution

What are enzymes

Q 17 | Page 423 | view solution

What is the effect of denaturation on the structure of proteins?

Q 18 | Page 423 | view solution

How are vitamins classified? Name the vitamin responsible for the coagulation of blood.

Q 19 | Page 423 | view solution

Why are vitamin A and vitamin C essential to us? Give their important sources.

Q 20 | Page 423 | view solution

What are nucleic acids? Mention their two important functions.

Q 21 | Page 423 | view solution

What is the difference between a nucleoside and nucleotide ?

Q 22 | Page 423 | view solution

The two strands in DNA are not identical but are complementary. Explain.

Q 23 | Page 423 | view solution

Write the important structural and functional differences between DNA and RNA.

Q 24 | Page 423 | view solution

What are the different types of RNA found in the cell?

Q 25 | Page 423 | view solution

Extra questions

What type of bonding helps in stabilising the ∝-helix structure of proteins?

view solution

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