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BCHET 149 Molecules of Life

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IGNOU BCHET-149- Solved Assignment

Are you looking to download a PDF soft copy of the Solved Assignment BCHET 149 Molecules of Life is the right place for you. This particular Assignment references the syllabus chosen for the subject of Hindi, English, for the Jul 25 – Jan 26, Jul 24 – Jan 25 session. The code for the assignment is BCHET-149 and it is often used by students who are enrolled in the BSC (Honours), IGNOU CBCS Solved Assignments Degree. Once students have paid for the Assignment, they can Instantly Download to their PC, Laptop or Mobile Devices in soft copy as a PDF format. After studying the contents of this Assignment, students will have a better grasp of the subject and will be able to prepare for their upcoming tests.

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IGNOU BCHET-149 (January 2026 – December 2026) Assignment Questions

PART-A

1. a) What are the various constituents of cell membrane? Describe the modes by which cell membrane controls the transport of ingoing and outgoing molecules.
b) Describe the classification of carbohydrates giving examples for each class.

2. a) Explain the significance of carbohydrates as blood group substances.
b) Describe the physical/chemical ways of detecting unsaturation in fatty acids. How does unsaturation affect the melting points of fatty acids?

3. a) What are prostaglandins? Explain their physiological roles in human beings.
b) Giving the structures differentiate between a nucleotide and a nucleoside.

4. a) Describe and compare the various forms of DNA and explain the bonds that hold the double helix of the DNA together.
b) Describe the conversion of G-3-P into pyruvate during the glycolytic process.

5. Write short notes on the following:
a) Convention in biochemical energetics
b) Mechanism of muscle contraction
c) Regulation of glycogen metabolism

PART-B

6. a) Describe the phenomenon of substrate channeling observed in the conversion of pyruvate into acetyl Co-A.
b) Taking the example of palmitic acid oxidation, explain the energetics of the fatty acid metabolism.

7. a) Name and describe in brief the processes involved in drug action.
b) Describe the role of enzymes in health sciences.

8. a) Describe the process of DNA replication and illustrate your answer.
b) What is genetic code? Enlist the characteristics of a genetic code.

9. a) What is meant by operon? Describe the expression process of Lac-operon of E. coli.
b) What is meant by drug-receptor complex? Explain the drug-receptor theory of biological activity of a drug.

10. a) describe the steps involved in the energetics of the degradation of fatty acids.
b) Name the methods of determination of amino acids sequence in a protein and describe any one method.

IGNOU BCHET-149 (January 2025 – December 2025) Assignment Questions

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

IGNOU BCHET-149 ASSIGNMENTS DETAILS

University : IGNOU (Indira Gandhi National Open University)
Title : Molecules of Life
Language(s) : English, Hindi
Code : BCHET-149
Degree : BSCG
Subject : Chemistry
Course : Discipline Specific Electives (DSE)
Author : ignouedumart.com Panel
Publisher : Distance Gyan Publishing House Pvt. Ltd.

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