Free NCERT Solutions For Class 12 Chemistry Chapter 14 : Biomolecules Free PDF Download

INTEXT QUESTIONS

Question 1:
Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring
compounds) are insoluble in water. Explain.

Question 2:
What are the expected products of hydrolysis of lactose?

Question 4:
The melting points and solubility in water of amino acids are generally higher than that of the
corresponding halo acids. Explain.

Question 5:
Where does the water present in the egg go after boiling the egg?

Question 6:
Why cannot vitamin C be stored in our body?

Question 8:
When RNA is hydrolyzed, there is no relationship among the quantities of different bases
obtained. What does this fact suggest about the structure of RNA?

TEXT SOLUTION

Question 1:
What are monosaccharides?

Question 2:
What are reducing sugars?

Question 3:
Write two main functions of carbohydrates in plants.

Question 4:
Classify the following into monosaccharides and disaccharides.
Ribose, 2-deoxyribose, maltose, galactose, fructose and lactose.

Question 5:
What do you understand by the term glycosidic linkage?

Question 6:
What is glycogen? How is it different from starch?

Question 7:
What are the hydrolysis products of (i) sucrose and (ii) lactose?

Question 8:
What is the basic structural difference between starch and cellulose?

Solution 8:

Question 10:
Enumerate the reactions of D-glucose which cannot be explained by its open chain structure.

Question 11:
What are essential and non-essential amino acids? Give two examples of each type.

Question 12:
Define the following as related to proteins
(i) Peptide linkage (ii) Primary structure (iii) Denaturation.

Question 13:
What are the common types of secondary structure of proteins?

Question 16:
How do you explain the amphoteric behaviour of amino acids?

Question 17:
What are enzymes?

Question 18:
What is the effect of denaturation on the structure of proteins?

Question 19:
How are vitamins classified? Name the vitamin responsible for the coagulation of blood.

Question 20:
Why are vitamin A and vitamin C essential to us? Give their important sources.

Question 21:
What are nucleic acids? Mention their two important functions.

Question 22:
What is the difference between a nucleoside and a nucleotide?

Solution 22:

Question 23:
The two strands in DNA are not identical but are complementary. Explain

Question 24:
Write the important structural and functional differences between DNA and RNA.

Question 25:
What are the different types of RNA found in the cell?