Biomolecules
Mr. Bhavesh Kandpal - PGT Chemistry
ii) Multiple Choice Questions. 1 marks each
1. Carbohydrates that cannot be hydrolysed further to give simpler unit of polyhydroxy aldehyde
or ketone is called
a. Monosaccharide b. Oligosaccharide
c. Polysaccharide d. None of these
2. One molecule of sucrose on hydrolysis gives
a. 2 molecules of glucose b. 2 molecules of glucose and 1 molecule of fructose
c. 2 molecules of fructose d. 1 molecules of glucose and 1 molecule of fructose
3. Sugar present in milk is
a. Sucrose b. Lactose
c. Glucose d. Fructose
4. Cellulose is a
a. Monosaccharide b. Disaccharide
c. Trisaccharide d. Polysaccharide
5. Which one of the following is a disaccharide
a. Glucose b. Starch
c. Maltose d. Fructose
6. Which one of the following is a disaccharide
a. Glucose b. Starch
c. Maltose d. Fructose
7. what are reducing sugars?
8. Glucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?
9. Write the product formed on reaction of D-glucose with Br2 water.
10. Define anomer?
11. What do you understand by the term glycoscidic linkage?
12. What are the products of hydrolysis of maltose?
13. What are the products of hydrolysis of lactose?
14. Name the two components of starch, which among them is water soluble?
15. What type of linkage is responsible for the formation of proteins?
16. Deficiency of which vitamin causes bone deformities in children.
17. Define nucleotides
18. What are the different types of RNA molecules which perform different functions?
iii) Short Answer Type Questions. 2 marks each
1. Write the reactions involved when D-glucose is treated with
i. HCN
ii. Br2 water
2. What is the difference between fibrous and globular protein, give examples of each.
3. Amino acids show amphoteric behaviour. Explain.
4. Differentiate between alpha-helix and beta-pleated structures of protein. What type of bonding
stabilises the alpha helix structure.
5. What are essential and non-essential amino acids? Give one example of each type.
6. Name the diseases caused due to deficiency of vitamin A, vitamin E, vitamin B 12.
7. Deficiency of which vitamin causes scurvy, rickets.
8. Write the important structural and functional differences between DNA and RNA.
9. i) What are the structural differences between starch and cellulose
ii) What type of linkage is present in nucleic acid?
10. i. Why vitamin C cannot be stored in our body?
ii. What is the difference between nucleotide and nucleoside.
iv) Short Answer Type Questions. 3 marks each
1. Define the following terms.
i. Glycosidic linkage
ii. Invert sugar
iii. Oligosaccharides
2. Discuss the effect of temperature and pressure on the adsorption of gases on solids.
3. Define the following as related to proteins.
i. Peptide linkage
ii. Primary structure
iii. Denaturation
4. What are enzymes? Describe their functions. Name two diseases caused due to deficiency of
enzymes.
5. i) What are the structural differences between starch and cellulose?
ii) What type of linkage is present in nucleic acid?
