MCH-15 2025 SOLVED ASSIGNMENT

Description

Tutor Marked Assignment
BIOLOGY FOR CHEMISTS (MCH-015)
Course Code: MCH-015
Assignment Code: MCH-015/TMA/2025
Maximum Marks: 100

Note: Attempt all questions. The marks for each question are indicated against it.

1. a) What is the name of the system of classification applied for the domains of life? List
the common features of prokaryotes and eukaryotes.
(5)
b) Which cell organelle is called the “control centre”? Describe its composition. (5)
2. a) Write the step wise reactions of formation of a glycoside taking glucose as an
example.
(5)
b) What are hormones? Name the classes of steroid hormones along with their important
functions.
(5)
3. a) Describe how the cell membrane regulates the movement of various molecules into
and out of the cell.
(5)
b) Differentiate between the essential and non essential amino acids. Describe the
amphoteric nature of amino acids.
(5)
4. a) Explain the geometry of the peptide backbone. Illustrate your answer. (5)
b) Describe the tertiary structure of proteins in terms of the bonds and forces that
stabilise the structure.
(5)
5. a) Why the metabolism is called the ‘intermediary metabolism’? Describe the convergent
and divergent nature of metabolism.
(5)
b) Explain what is meant by high energy phosphate compounds and what their
significance is in the living systems.
(5)
6. a) What is EMP pathway? Explain the isomerisation reaction of glycolysis giving the
catalyst involved.
(5)
b) Explain the role of constituent enzymes of pyruvate dehydrogenase complex involved
in the conversion of pyruvate into acetyl-CoA.
(5)
7. a) What are ketone bodies? Explain their significance to human beings. (5)
b) Draw a diagrammatic sketch of the urea cycle indicating the products and enzymes
involved.
(5)
8. a) Give a comparative account of purine and pyrimidine nucleotide degradation. (5)
b) Define immunity. Differentiate between innate and acquired immunity. (5)
9. a) What is the significance of antigen-antibody interaction? Describe in brief the
mechanisms involved in antigen-antibody interaction.
(5)
b) Name the enzymes involved in DNA replication and describe their role in this process. (5)
10. Write short notes on the following : (10)
a) Water and electrolyte balance in living systems
b) Blood group substances
c) Nucleosides and nucleotides
d) Homeostasis