HSC/II/06 Student's Copy
2 0 1 8
Pre-CBCS
2nd Semester
HOME SCIENCE
Biochemistry
Full Marks 55
Time 2½ hours
PART A—OBJECTIVE
Marks 20
The figures in the margin indicate full marks for the questions
SECTION—A
Marks 5
Tick the correct answer in the brackets provided 1×5=5
1. Starch is an example of
monosaccharide
disaccharide
polysaccharide
pentasaccharide
/387 1 Contd.
2. Which one of the following mostly forms the lipid bilayer of cell membrane?
Glycolipids
Phospholipids
Lipolipids
None of the above
3. The linkage between two amino acids is known as
hydrogen bond
covalent bond
phosphodiester bond
peptide bond
4. Which one of the following does not influence enzyme activity?
Pressure
Temperature
pH
None of the above
5. DNA is a polymer of
nucleoside
nucleotide
acetyl CoA
alcohol
HSC/II/06/387 2 Contd.
SECTION—B
Marks 15
Write notes on the following 3×5=15
1. Definition and scope of biochemistry
2. Biological importance of lipids
3. Essential and non-essential amino acids
4. Holoenzyme
5. Glycogenesis
PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. Define carbohydrates. Write the important properties and biological
importance of carbohydrates.
OR
Classify carbohydrates giving example of each class. 7
2. Write and explain the structure of triglycerides. Mention the important
properties of lipids.
OR
Write notes on the following 3½×2=7
Essential and non-essential fatty acids
Phospholipids
HSC/II/06/387 3 Contd.
3. What are proteins? Classify proteins giving example of each class.
OR
Write the properties and functions of proteins. 3½+3½=7
4. Write notes on the following 3½×2=7
Functional properties of enzyme
Lock and key theory of enzyme action
OR
Briefly explain the different types of enzyme inhibition. 7
5. What do you mean by Krebs cycle? Discuss various steps involved in
Krebs cycle.
OR
Write the properties and functions of DNA. 7