IGNOU MFN 2 SOLVED ASSIGNMENT

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MFN 002 (July 2025) - ENGLISH

ASSIGNMENT -2

TMA-2

Nutritional Biochemistry

Course Code: MFN-002

Assignment Code: MFN-002/AST-2/TMA-2/25-26

Last Date of Submission: 30th November, 2025

Maximum Marks:100

This assignment is based on Units 1 - 12 of the MFN-002 Course

Section A -Descriptive Question

(80 Marks)

There are ten questions in this part. Answer all questions.

1.a) What are monosaccharides? Explain any two properties of monosaccharides.

b) Explain the following terms:

i. Saponification

ii. Rancidity

2.a)What are Eicosonoids? Briefly describe their role in the body.

b) Discuss the four basic structural levels of proteins, giving exampls

3. Discuss the properties and importance of following vitamins in our body:

a) Vitamin C

b) Vitamin K

4. a) Explain the mechanism of enzyme action in our body. Enumerate the factors affecting enzyme activity.

b) Explain the process of absorption of amino acids and peptides in our body.

5. a) What is gluconeogenesis? Discuss the four substrates used in gluconeogenesis.

b) What are the components of the electron transport chain? Explain briefly.

6. a) How cholesterol is metabolized in our body? Explain.

b) Differentiate between the following sets of terms:

i. LDL and HDL

ii. Ketogenic and Glucogenic amino acid

7.a) Briefly describe synthesis of Pyrimindine in our body.

b) How and where toxic ammonia is converted into urea in our body? Explain briefly.

8. a) Define free radicals. Explain physiological mechanisms to limit free radical damage

b) What is the composition and function of chylomicron?

9.  a) Describe functions of following minerals:

i. Calcium

ii. Iron

b) Briefly enumerate biochemical role of following hormones:

i. Insulin

ii. Glucocorticoids

10. a) List the common inborn errors due to carbohydrate metabolism. Explain briefly any two of them.

b) Define haemoglobinopathies. Elaborate any one in detail.

Section B - OTQ (Objective Type Questions)

1. Explain the following in 2-3 sentences. Also give the structure wherever possible.

a.Recombinnt DNA

b. Mutarotation

C. Sterols

d. Zwitterion

e. Holoenzyme

f. Competitive inhibition

g. Coenzyme A

h. Chiral carbon atom

i. Micelle

j. Glycolysis

2. Name the defective enzyme in the following diseases:

a) Alcaptonuria

b) Gaucher's disease

c) Homocystinuria

d) Pentosuria

e) Albinism

3. Give the significance/role of following:

a) Conversion of IMP to AMP

b) Vitamin B6 in transamination

c) Oxygen free radicals

d) Phenylalanine hydroxylase

e) Fight or flight response

MFN 002 (July 2026) - ENGLISH

ASSIGNMENT -2
TMA-2
Nutritional Biochemistry
 Course Code: MFN-002
 Assignment Code: MFN-002/AST-2/TMA-2/25-26
Last Date of Submission: 30th November,2026
 Maximum Marks:100
This assignment is based on Units 1 - 12 of the MFN-002 Course
Section A –Descriptive Question (80 Marks)
There are ten questions in this part. Answer all questions.
1. a) What is simple sugar? Give its general formula.
b) List any two chemical properties of the following:
i)Monosaccharide
ii)Natural fats
c) Explain briefly why sucrose cannot have α and ß forms?
(4)
(2+2)
(2)
2. a) Differentiate between saturated and unsaturated fatty acids. Give one example
each of saturated, monounsaturated and Polyunsaturated fatty acids.
b) What are vitamins? List a few characteristics which all vitamins possess.
c) What is the significance of transaminase reaction?
(4)
(4)
(2)
3. a) Discuss the role of calcium in our body. Highlight the significance of calcium
as a signal transmitter.
b) Describe the metabolic role of the iron in our body.
c) Illustrate and explain the active transport of glucose.
(4)
(4)
(2)
4. Illustrate the following by giving enzyme names involved in the reactions:
a) Citric acid cycle
b) ß-oxidation of fatty acid
(5)
(5)
5. a) What is hydrogenation? What are the harmful effects of hydrogenation?
b) Discuss the role of carnitine in transfer of fatty acids.
c) What are the various enzymes involved in the regulation of glycogenolysis?
(4)
(4)
(2)
6. a) Explain the metabolism of LDL with the help of a diagram.
b) Briefly explain the general mechanism of signal generation.
(4)
(6)
7. a) What is the metabolic significance of HMP Pathway?
b) What do you understand by the term ‘digestion’? Give the digestion of
proteins in our body.
c) What is the metabolic fate of amino acids after the removal of α-amino group?
(4)
(4)
(2)
8. a) What do you understand by the term “inborn errors of metabolism”? Discuss
its etiology.
b) Comment on the following statements
i) In Alcaptonuria the urine becomes dark in colour upon standing.
ii) MSUD is also known as branched chain ketonuria.
iii) Tay -sach’s disease is caused by abnormal gene.
c) What is Niemann-Pick Disease?
(2)
(6)

Section B - OTQ (Objective Type Questions) (20 Marks)
3. a) Define the following: (5)
i) Mutarotation
ii) Glycogenesis
iii) Anaplerotic reactions
iv) Type IIb hyperlipoproteinemia
v) Ketosis
b) Give one word for the following: (5)
vi) Name any one enzyme whose concentration increases during:
a) Myocardial Infarction
b) Acute Pancreatitis
c) Renal Tubular Necrosis
vii) Name defective enzymes of the following:
a) Phanylketonuria
 b) Gaucher’s disease
4. a) Describe the significance/role of following (10)
i) Conversion of IMP to AMP and GMP
ii) Synthesis of Orotic acid
iii) Oxygen Free Radicals
iv) G Protein-Coupled Receptor (GPCR)
v) Fight or Flight Response 

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