2 0 1 8
Pre-CBCS
5th Semester
ZOOLOGY
SEVENTH PAPER
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. Glycogen and starch are
homoglycans
heteroglycans
conjugated glycans
monosaccharides

2. Vitamin D is commonly known as
ascorbic acid
cholesterol
calciferol
retinol
3. The net gain of ATP in glycolysis is
2
4
32
36
4. Complex II (Succinate-Q Reductance) of electron transport chain receives
electrons from
NADH
NADH2
NADPH2
FADH2
5. Ornithine cycle occurs in
kidney
liver
muscle
pancreas
SECTION—B
Marks 15
Write short notes on the following in 5-8 sentences each 3×5=15
1. Significance of lipids
2. Ribozymes
3. Gluconeogenesis
4. TCA cycle
5. Nucleic acids

PART B—DESCRIPTIVE
Marks 35
The figures in the margin indicate full marks for the questions
1. What are carbohydrates? Describe the different types and significance
of carbohydrates. 7
OR
What are peptides? Explain the structure and properties of peptides. 7
2. Derive Michaelis-Menten equation. 7
OR
Write short notes on the following 3½+3½=7
Coenzymes
Vitamins
3. What is glycolysis? Explain various steps in glycolysis. 7
OR
What is glycogenolysis? Explain various steps in glycogenolysis. 7
4. Briefly explain various complexes in the mitochondrial electron transport
chain. 7
OR
Give an account of HMP shunt. 7
5. Explain various steps of urea cycle. 7
OR
What is lipogenesis? Explain various steps involved in lipogenesis. 7