[KT 504] AUGUST 2008 Sub.

Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. Explain the steps of beta oxidation of Palmitic acid. Add a note on Energetics.
2. What is Gluconeogenesis? Describe the pathway involved in Gluconeogenesis.
Add a note on regulation of Gluconeogenesis.

II. Write Short notes on : (10 x 5 = 50)

1. Functions of Vitamin C.
2. Digestion and absorption of lipids.
3. Hemoglobin S.
4. Isoenzymes.
5. Structure of cell membrane.
6. Define BMR. What are the factors that can affect BMR?
7. Define oxidative phosphorylation. Explain chemiosmotic theory.
8. Galactosemia.
9. Ketogenesis.
10. Glucose tolerance Test.

III. Short Answer Questions : (10 x 2 = 20)

1. Name the Essential fatty acids.
2. Significance of HMP shunt pathway.
3. Benedicts test.
4. Inhibitors of citric Acid cycle.
5. Chloride shift.
6. Functions of calcium.
7. Lipotropic factors.
8. Normal blood levels of (a) Cholesterol (b) Bilirubin (c) Sodium (d) Pottasium.
9. Phospholipids.
10. Flurosis.

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[KU 504] FEBRUARY 2009 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. Sources & fate of acetyl CoA, Explain the denovo synthesis of cholesterol and
its regulation.
2. Explain how pyruvate enters the Kreb’s citric acid cycle for oxidation.
How many ATPs are produced in this pathway.

II. Write Short notes on : (10 x 5 = 50)

1. Write a note an chemiosmotic theory.
2. Active transport.
3. Uronic acid pathway.
4. Insulin.
5. Wald’s visual cycle.
6. Collagen.
7. Glycosaminoglycons (GAGS).
8. Chromatography.
9. Levels of organization of proteins.
10. Calcium Homeostasis.

III. Short Answer Questions : (10 x 2 = 20)

1. Key enzymes of glycolysis.
2. Fatty liver.
3. Lipid peroxidation.
4. Zymogens.
5. BMR.
6. Normal levels of :
(a) B.U.N
(b) Fasting Serum Glucose
(c) LDH
(d) ALT
7. t : RNA
8. Vitamin K
9. Limiting amino acid.
10. Isoenzymes.

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[KV 504] AUGUST 2009 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. What are porphyrias? Classify different types of porphyrias and give the enzyme
defect and biochemical findings.
2. What is oxidative phosphorylation. Discuss the steps of the same and
mention its significance.

II. Write Short notes on : (10 x 5 = 50)

1. Classify RNA and explain the functions.
2. Hyper uricemia.
3. Renal glycosuria.
4. Cardiac troponin.
5. Structure of cholesterol and its importance in the body.
6. Beri Beri.
7. Enzyme poisons.
8. Flurosis.
9. What is protein energy malnutrition (PEM)? What are the types of PEM?
Write the importance features.
10. Functions of vitamin C.

III. Short Answer Questions : (10 x 2 = 20)

1. Effect of temperature on enzyme activity.
2. Define epimer. Name two epimers.
3. Phosphotidyl inositol importance.
4. Biochemical functions of selenium.
5. Benedicts test.
6. Ribose and deoxy ribose.
7. Lysosomes.
8. Bence Jones proteins.
9. Bile salts.
10. Cori cycle.

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[KW 504] FEBRUARY 2010 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. Define enzymes. Classify Enzymes with suitable examples.
Explain the concept of active site of enzymes.
2. Describe the steps of HMP shunt pathway. What is its significance?
How is it regulated?
II. Write Short notes on : (10 x 5 = 50)
1. Nutritional importance of proteins.
2. Describe the requirement, sources, metabolic functions and deficiency
manifestations of folic acid.
3. Explain with a neat labeled diagram of fluid mosaic model of biological membrane.
4. Total parenteral nutrition and its importance.
5. t – RNA.
6. Explain the metabolism and functions of HDL.
7. What are glycoproteins? Give three examples and its importance.
8. Chemiosmotic theory.
9. Rapaport leubering shunt pathway and its significance.
10. What are Nucleotides?
Name any three biologically important nucleotides and their importance.

III. Short Answer Questions : (10 x 2 = 20)

1. Why sucrose is called a non reducing disaccharide?
2. Name the essential fatty acids.
3. Name any four biologically important compounds derived from cholesterol.
4. What are phospholipids? Give two examples.
5. Name the essential aminoacids.
6. Mention any two biological functions of albumin.
7. Name the aminoacids required for purine biosynthesis.
8. Sickle cell hemoglobin.
9. Specific dynamic action.
10. Write the principle and significance of biuret test.

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[KX 504] AUGUST 2010 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. Describe the citric acid cycle. How is it regulated? What is its amphibolic role?
2. Describe the chemistry, absorption, functions and deficiency manifestations
of Vitamin A.

II. Write Short notes on : (10 x 5 = 50)

1. Inhibitors of Electron Transport Chain.
2. Transport of Bilirubin.
3. Vitamin E.
4. Substrate level Phosphorelation.
5. Gluconeogenesis.
6. Regulation of enzyme activity.
7. Abnormal hemoglobins.
8. Digestion and absorption of Triacylglycerols.
9. Biomedical importance of derivatives of Cholesterol.
10. Significance and disorders of Pentose Phosphate pathway.

III. Short Answer Questions : (10 x 2 = 20)

1. Mutarotation.
2. Subcellular organelles.
3. Free radicals.
4. Basal metabolic rate.
5. Essential amino acids.
6. Causes of fatty liver.
7. Renal glycosuria.
8. Role of HDL as scavenger of Cholesterol.
9. FIGLU.
10. Dietary fibers.

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[KY 504] FEBRUARY 2011 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 15 = 30)
1. Describe the chemistry, sources, daily requirement, biochemical functions and
deficiency manifestations of Vitamin – B12.
2. Describe how cholesterol is synthesized in our body.
What are the products formed from Cholesterol?

II. Write Short notes on : (10 x 5 = 50)

1. Active form of Vitamin D and its biochemical role.
2. Catabolism of Hemoglobin.
3. Protein energy malnutrition.
4. Ketogenesis.
5. Fatty acid synthase complex.
6. Glycogen Metabolism.
7. Enzyme inhibition.
8. Glycosylated hemoglobin.
9. Oxidation phosphorylation.
10. Regulation of blood glucose.

III. Short Answer Questions : (10 x 2 = 20)

1. Zymogen.
2. Name two zinc containing enzymes.
3. Ferritin.
4. Define Km.
5. Functions of selenium.
6. What are cytochromes?
7. Brown adipose tissue.
8. Lactose intolerance.
9. Define respiratory quotient.
10. Functions of Vitamin K.

******
[KZ 504] AUGUST 2011 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 100 Marks
Answer ALL questions
I. Essay Questions : (2 x 10 = 20)
1. Describe in detail TCA cycle and the energetics of the same.
Justify why TCA cycle is called an amphibolic cycle.
2. Describe in detail the components and chemiosmotic theory of electron transport chain.
II. Write Short notes on : (10 x 5 = 50)
1. Role of Niacin as Coenzyme.
2. Classification of hyperlipidemias and their clinical importance.
3. Sphingolipidoses.
4. Biochemical role of Vitamin C.
5. Cori’s cycle and Glucose Alanine cycle.
6. High Density Lipoprotein cycle.
7. Glycogenolysis.
8. Isomerism in carbohydrates.
9. Balanced Diet.
10. Fructose intolerance
III Short Answer Questions : (15 x 2 = 30)
1. Markers for lysosomes and mitochondria.
2. Fluorosis.
3. Role of Apo CII.
4. Define metalloenzymes with 2 examples.
5. Pulmonary surfactant – Structure and clinical importance.
6. Iodine number and its importance.
7. What is the function of Lipoprotein lipase?
8. Structure of lecithin.
9. Net Protein Utilization.
10. Chondroitin sulphate - Structure.
11. Double Reciprocal plot.
12. Alkaline phosphatase as a diagnostic tool.
13. What are the different forms of calcium in blood?
14. RDA and functions of Iodine.
15. Why Arachidonic acid is not considered ‘purely’ an essential fatty acid?

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[LA 504] FEBRUARY 2012 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

Revised (Non-Semester) Regulations
PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions in the same order
I. Elaborate on :
1. Describe the components and reactions of electron transport chain.
Add a note on its inhibitors. (1 x 10 = 10)
2. Describe the dietary sources, daily requirement, biochemical function and deficiency
symptoms of vitamin C. (1 x 5 = 5)
II. Write Short notes on : (10 x 2 = 20)
1. Balanced diet
2. Causes of hypoglycaemia.
3. Allosteric inhibition.
4. Obesity.
5. Alkaptonuria.
6. Functions of mitochondria.
7. Glycosylated haemoglobin.
8. Neo glucogenesis.
9. Thalessemias.
10. Puring salvage path way.
III. Short Answers on : (15 x 1 = 15)
1. Markers of nucleus and mitochondria.
2. Name 2 tumour markers.
3. Functions of phospho lipids.
4. Name the essential fatty acids.
5. Active forms of Thiamine and Riboflavin.
6. Name the ketone bodies.
7. Significance of rapaport – leubering cycle.
8. Name two glycogen storage diseases.
9. Significance of HMP shunt.
10. Name the derivatives of cholesterol.
11. Name the urea cycle disorder.
12. Causes of increased blood urea level.
13. Name the derivatives of tryptophan.
14. Fluorosis.
15. Parameter for the assessment of nutritive value of proteins.

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[LB 504] AUGUST 2012 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 100 Marks
Answer ALL questions
I. Elaborate on: Pages Time Marks
(Max.) (Max.) (Max.)
1. What are the components of Mitochondrial Electron
Transport Chain .Describe the events and inhibitors of
Oxidative phosphorylation. 16 25 min. 15
2. Explain the significance and reactions of Hexose
MonoPhosphate shunt and disorders associated to it. 16 25 min. 15
II. Write notes on:
1. Isoenzymes of Lactate dehydrogenase and their significance. 3 8 min. 5
2. Functions, Deficiency Symptoms of Vitamin Thiamine. 3 8 min. 5
3. Calcium homeostasis and its disorder. 3 8 min. 5
4. Metabolic adaptation in Fed state. 3 8 min. 5
5. What are the various muco polysaccharides. Add a note
on hyaluronic acid. 3 8 min. 5
6. Line Weaver Burk’s Plot and its significance. 3 8 min. 5
7. Enzymes, coenzymes, inhibitors of Pyruvate
Dehydrogenase Reaction. 3 8 min. 5
8. Alcohol metabolism. 3 8 min. 5
9. Fredrickson’s classification of hyperlipprotenemias. 3 8 min. 5
10. Mention the types of heteropolysaccharides and their functions. 3 8 min. 5

III. Short Answers on:

1. Cardiolipin. 1 5 min. 2
2. Mention the types of fatty acid oxidation. 1 5 min. 2
3. What are the products of Arachidonic acid? 1 5 min. 2
4. Carnitine. 1 5 min. 2
5. Anomerism. 1 5 min. 2
6. How Haemoglobin binds to oxygen. 1 5 min. 2
7. Km Value and its significance. 1 5 min. 2
8. Bronze Diabetes. 1 5 min. 2
9. WHO criteria for Diagnosis of Diabetes mellitus. 1 5 min. 2
10. Zellweger’s syndrome. 1 5 min. 2

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[LC 504] FEBRUARY 2013 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Elaborate on: (2 x 7.5 = 15)
1. What is the normal blood sugar level?
Describe in detail how it is maintained within normal limits.
2. Mention the source, daily requirement of vitamin B12.
Describe its absorption biochemical function and deficiency manifestations.

II. Write notes on : (10 x 2.5 = 25)

1. Fatty liver & lipotropic factors.
2. Digestion and absorption, transport of iron.
3. Isoenzymes and their diagnostic importance.
4. Define Biological Oxidation & mechanism of ATP synthesis.
5. The principles of balances diet.
6. Transport mechanism-across cell membrane.
7. Cytochrome P450.
8. Galactosemia.
9. Prostaglandins and their importance.
10. Ketosis.

III. Short Answers on: (10 x 1 = 10)

1. Key enzyme of cholesterol synthesis and its regulation.
2. FIGLU.
3. Refsum’s disease.
4. Comparison between prokaryotic an eukaryotic cells.
5. Glycosides.
6. Metal cofactors of enzymes.
7. Beri Beri.
8. Lipid Profile.
9. Limiting aminoacids.
10. Glucose 6 Phosopate dehydrogenase enzyme.

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[LD 504] AUGUST 2013 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Elaborate on: (2 x 7.5 = 15)
1. Classify enzymes. Describe in detail the various factors affecting enzyme action.
Add a note on enzyme regulation
2. Name the ketone bodies? How are they formed and utilised in the body.
Add a note on the metabolic changes in diabetic ketoacidosis.

II. Write notes on: (10 x 2.5 = 25)

1. 2, 3 BPG- Formation and its role.
2. Mechanism of synthesis of ATP in ETC.
3. Explain ‘Methyl Folate trap’.
4. Carnitine shuttle.
5. What are dietary fibres and explain their importance in human nutrition with
respect to the prevention of diseases.
6. Write briefly about the significance of HMP shunt pathway.
7. Sources, RDA & Biological role of Vitamin C.
8. Describe the energetics of complete oxidation of 1 mole of glucose to CO2 & H2O
under aerobic conditions.
9. Bile salts – Synthesis & biological role.
10. Write briefly about calcium homeostasis.

III. Short Answers on: (10 x 1 = 10)

1. What are zymogens. Give an example.
2. Mention two inhibitors of ETC with their site of action.
3. What is specific dynamic action and importance in calculating caloric
requirements of an individual.
4. What are trace mineral. Give RDA of any 2 of them.
5. What is Steatorrhoea?
6. What is Suicide inhibition? Give an example.
7. Laboratory Criteria for diagnosis of Diabetes Mellitus.
8. Name the insulin dependent glucose transporters and their tissue distribution.
9. What is pulmonary surfactant and its clinical importance?
10. What is the biochemical basis of development of cataract in Diabetes Mellitus.

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[LD 504] NOVEMBER 2013 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Elaborate on: (2 x 7.5 = 15)
1. Describe the how bilirubin is formed and excreted in the body.
2. Describe the process by which ATP is synthesized in the body.

II. Write notes on: (10 x 2.5 = 25)

1. Role of carnitine in beta-oxidation of fatty acids
2. Covalent modification of enzymes in regulation of enzyme activities
3. Lactose intolerance
4. What is the importance of the pentose phosphate pathway in the body?
5. Gluconeogenesis, with reference to definition, substrates, sites and importance in the
Body.
6. Role of vitamin D in the body.
7. Causes of iron deficiency and manifestations of such deficiency (2 +3).
8. Isoenzymes, with reference to definition, examples and clinical importance.
9. Glycated haemoglobin, with reference to its formation, reference value in blood and
its clinical importance.
10. Thiamine, with reference to its functions in the body, dietary sources and deficiency
manifestations.

III. Short Answers on: (10 x 1 = 10)

1. List the vitamins that are required for the functioning of the citric acid cycle.
2. Give 2 examples of drugs that act as inhibitors of enzyme and name the enzyme that
each one inhibits.
3. What is the function of mitochondria in a cell?
4. What is the mechanism of action of statins? What is the therapeutic use of this group of
drugs?
5. List 2 dietary sources and 2 biochemical functions of vitamin C in the body.
6. Explain the mechanism of action of cyanide as a poison.
7. List 2 good dietary sources of iodine. What is the function of this mineral in the body?
8. Enzyme defect and commonest clinical feature in von Gierke’s disease?
9. What is meant by glycaemic index of food?
10. List 2 differences between marasmus and kwashiorkor?

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[LE 504] FEBRUARY 2014 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Elaborate on: (2 x 7.5 = 15)
1. Describe the synthesis of glucose from alanine and mention its regulation.
2. How are low-density lipoproteins (LDL) produced in the body? Describe with the help
of a diagram, their metabolic fate. What determines this process of their metabolic fate?
Explain the clinical significance of this lipoprotein.

II. Write notes on: (10 x 2.5 = 25)

1. Name 5 enzymes, serum levels of which are increased in disease conditions, along with
the corresponding disease condition where such changes are seen.
2. Briefly explain the chemiosmotic hypothesis of Mitchell.
3. What is meant by dietary fibre? Explain its importance in one’s diet.
4. Explain the folate trap hypothesis.
5. What is surfactant? Explain its importance in the body in health and disease.
6. Explain, with a diagram, the fluid mosaic model of cell membranes.
7. What are good dietary sources of iron?
Explain how iron is absorbed from the gastrointestinal tract.
8. Explain how the activity of an enzyme is affected by the pH of the medium.
9. What are the functions of calcium in the body?
10. Describe the functions and deficiency manifestations of vitamin A.

III. Short Answers on: (10 x 1 = 10)

1. Explain the mechanism of action of cyanide as a poison.
2. List 2 differences between hexokinase and glucokinase.
3. Give 2 examples of drugs that act as inhibitors of enzyme and name the enzyme that
each one inhibits.
4. Explain the role of 2, 3 bisphosphoglycerate in supply of oxygen to tissue.
5. List 2 differences between foetal and adult forms of haemoglobin.
6. Why do patients with cholelithiasis often pass clay-coloured stools?
7. What is meant by the metabolic syndrome? What is the significance of this condition?
8. Write two functions & RDA of pyridoxine.
9. List 2 differences between marasmus and kwashiorkor?
10. Give two examples of substrate level phosphorylation.

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[LF 504] AUGUST 2014 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
Draw Suitable diagrams wherever necessary
I. Elaborate on: (1 x 10 = 10)
1. Describe the beta oxidation of Palmitic acid and its regulation.

II. Write Notes on: (2 x 5 = 10)

1. Coenzymic role of Pyridoxine.

2. Factors regulating blood calcium.

III. Short Answers on: (10 x 3 = 30)

1. Wilson’s disease.

2. Define isoenzymes and give two examples.

3. Specific dynamic action.

4. Chemiosmotic theory.

5. Von Gierke’s disease.

6. Pyruvate dehydrogenase complex.

7. Ionophores.

8. Oral glucose tolerance test.

9. Deficiency manifestations of vitamin D.

10. Biochemical functions of Iron.

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[LF 504] NOVEMBER 2014 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Elaborate on: (1 x 10 = 10)
1. Describe in detail about the metabolic change and complications in Diabetes Mellitus.
Add a short note on the biochemical investigations to be done in Diabetes Mellitus.

II. Write Notes on: (2 x 5 = 10)

1. Write in detail about compounds which affects Electron Transport Chain & Oxidative
Phosphorylation.

2. Write about the biological actions & clinical applications of Prostaglandins.

III. Short Answers on: (10 x 3 = 30)

1. Therapeutic uses of Enzymes.

2. Types of Lipases.

3. Lipotrophic Factors.

4. Metabolism of Propionyl CoA.

5. Prevention of Atherosclerosis.

6. Allosteric regulation.

7. Significance of multi-enzyme complexes with example.

8. Vitamin -D deficiency.

9. Functions of Phosphate.

10. What is Saponification and Iodine Number? Write its importance.

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[LG 504] FEBRUARY 2015 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Essay: (1 x 10 = 10)
1. Write in detail about the dietary sources, daily requirement and biochemical
functions of Thiamine. Add a note on the deficiency manifestations.

II. Write notes on: (2 x 5 = 10)

1. Apolipoproteins.

2. Metabolism of Adipose tissue in fasting condition.

III. Short answers on: (10 x 3 = 30)

1. Fate of Oxaloacetate.

2. Liver Enzymes.

3. Functions of Magnesium.

4. Dietary fibres.

5. Cytochrome P450.

6. Functions of Phospholipids.

7. Suicide Inhibition.

8. Causes for Abnormal GTT Curves.

9. Biologically important peptides.

10. Biological value of proteins.

******
[LH 504] AUGUST 2015 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Essay: (1 x 10 = 10)
1. Component and function of phospholipids.

II. Write notes on: (2 x 5 = 10)

1. Glycolysis in RBC.

2. Shuttle pathways across mitochondrial membranes.

III. Short answers on: (10 x 3 = 30)

1. Ocular changes in vitamin A deficiency.

2. Amphipathic lipids.

3. Kwashiorkor.

4. Enzymes in diagnosis of Myocardial infarction.

5. Biochemical functions of zinc.

6. Hormones that regulate blood calcium level.

7. Mechanism of cyanide poisoning.

8. Metabolism of glucose-6-phosphate.

9. Lipoprotein lipase.

10. Cori cycle.

******
[LI 504] NOVEMBER 2015 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : 180 Minutes Maximum: 50 Marks
Answer ALL questions
I. Essay: (1 x 10 = 10)
1. Write a note on the metabolism of Vitamin D.

II. Write notes on: (2 x 5 = 10)

1. Competitive enzyme inhibition.

2. Carnitine.

III. Short answers on: (10 x 3 = 30)

1. Fatty liver.

2. Inhibitors of Citric acid Cycle.

3. Cholesterol lowering action of FIBRATES.

4. One Carbon compound.

5. Functions of Copper.

6. Biochemical alteration in PEM (Protein Energy Malnutrition).

7. Conjugations.

8. Stereoisomerism.

9. Actions of Insulin.

10. Hyperglycemic Hormones.

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[LJ 504] AUGUST 2016 Sub. Code : 4055

FIRST M.B.B.S. DEGREE EXAMINATION

PAPER V – BIOCHEMISTRY - I
Q. P. Code : 524055
Time : Three hours Maximum: 50 Marks
Answer ALL questions.
I. Essay : (1 x 10 = 10)
1. Describe the digestion and absorption of carbohydrates. Briefly write the
metabolic fate of pyruvate.

II. Write notes on: (2 x 5 = 10)

1. Metabolism of LDL.
2. Mode of action of enzymes.

III. Short answers on: (10 x 3 = 30)

1. Inhibition of ATP synthesis.

2. Wald’s visual cycle.

3. Biochemical functions of vitamin C.

4. Functions of phosphorus.

5. Calcitonin.

6. Define BMR and mention the factors affecting it.

7. Consequences of diabetic ketosis.

8. Membrane proteins.

9. Coenzyme activity of biotin.

10. Lecithin cholesterol acyltransferase (LCAT).

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[LJ 504] NOVEMBER 2016 Sub.Code :4055

M.B.B.S. DEGREE EXAMINATION

FIRST YEAR
PAPER V – BIOCHEMISTRY - I

Q.P. Code: 524055

Time: Three hours Maximum : 50 Marks
Answer All Questions
I. Essay: (1 x 10 = 10)

1. Describe the sources, daily requirement, absorption, biochemical function and

deficiency manifestations and toxicity of iron.

II. Write notes on: (2 x 5 = 10)

1. Write about Glycated haemoglobin, fructosamine, advanced glycation end products.

2. Pyruvate dehydrogenase complex.

III. Short answers on: (10 x 3 = 30)

1. Functions of pyridoxal phosphate.

2. Factors affecting BMR (Basal Metabolic Rate).
3. Km value.
4. Write about amino sugar with example and its importance.
5. Lactose intolerance.
6. Diagnostic uses of enzymes.
7. Cahill and Cori cycle.
8. Vitamin K cycle.
9. Functions of copper.
10. Chylomicrons.

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