BCHET-149 EM 2025 SOLVED ASSIGNMENT

Description

ASSIGNMENT
Molecules of Life
Elective Course in Chemistry

Course Code: BCHET-149
Assignment Code: BCHET/TMA/2025
Maximum Marks: 100

Answer all the questions given below.
Part-A
1. a) Describe the biochemical composition of a living organism (5)
b) Explain the structure and functions of mitochondria. (5)
2. a) Why do monosaccharides form cyclic structure? Draw the structures of open chain and
cyclic forms of glucose.
(5)
b) Taking D-glucose as an example explain the term mutarotation. (5)
3. a) What is the principal structural difference between amylose and cellulose? Explain
giving structures.
(5)
b) What is the difference between a fat and a fatty acid? Give definition of iodine
number.
(5)
4. a) Describe the structural differences between a triacylglycerol and a phospholipid. Give
one example in each case.
(5)
b) What are the similarities in composition amongst the four DNA nucleotides. (5)
5. a) Describe the isoelectric point. With the help of an example explain the utility of this
property of amino acids and how is it useful in maintaining pH in human systems.
(5)
b) How are the peptides named? Write the structure of a tripeptide of your choice and
write its full and abbreviated name.
(5)
Part-B
6. a) What is meant by active site of an enzyme? How do the binding groups and catalytic
groups of an active site differ from each other?
(5)
b) What is the basic principle involved in the mechanism of enzyme action in biological
reactions? Explain.
(5)
7. a) What is the significance of oxidative phosphorylation? Illustrate with the help of two
examples.
(5)
b) How is the enzyme, pyruvate dehydrogenase complex different from other enzymes ?
How does it function in the conversion of pyruvate to acetyl- CoA?
(5)
8. a) What are the similarities between DNA replication and RNA transcription? (5)
b) Describe the factors that affect the immune response. (5)
9. a) Describe the interrelationship amongst the metabolic pathways. (5)
b) Write the steps of the degradation of amino acids and give a diagrammatic
representation.
(5)
10. a) Describe the energetic of the degradation of fatty acids. (5)
b) Explain the mechanism of drug action