Biochemistry 1st Year MBBS paper for practise
|Q1a.Define pH, What is the influence of excess Hydrogen ion on the structure & functions of Proteins, how are these excess hydrogen ions are compensated normally in the plasma
b.Describe Receptor? Illustrate the events of G protein activation & formation of IP3 &DAG
c What do you understand by Lipid anchored protein of cell membrane 2.5+1.5+1
Q2a. Extracellular matrix is composed of several proteins, Collagen is one of the major fibrous structural protein of ECM, Write the synthesis steps of collagen 2.5
- Proteoglycans is also second major component of ECM which holds water. How do you
differentiate between Proteoglycans to Glycoproteins 1.5 c. Write the biochemical cause & symptoms of Lactose intolerance 1
Q3a.Enumerate the repeated (regular) & non repeated secondary structures of Protein 1.5
- Define Domain, what are the components of domain, how are these tertiary structures
of Protein folded & stabilized 2.5
- Enumerate four Indispensable Amino acids (Essential Amino acids) 1
Q4 a. Give an illustrative diagrammatic view of complete degradation process of heme in 3
to bilirubin.
- Total serum bilirubin level of new born baby is highly increased up to 20mg that diffuses
to the skin, eyes and other tissues; baby was immediately taken to the incubator
for phototherapy
- What are the possible biochemical causes of jaundice in new born baby 1+ 1
- Elaborate the mechanism of Phototherapy to decrease highly increased bilirubin in tissues
Q5. A patient of ischemic heart disease brought to the Cardiac emergency, he was diagnosed a case of Myocardial infarction on the basis of symptoms, ECG, Examination & Lab findings, Answer the following questions
- Enlist proteins & Cardiac enzymes which will rise in plasma of MI patient 1.5
- How do you differentiate b/w Iso enzymes to Coenzymes 1.5
- A patient serum cholesterol level was much above than normal. He was prescribed Statins
a group of drug which blocks the main enzyme of cholesterol synthesis at the cellular level to decrease high cholesterol.(Patient value 350 mg Cholesterol, Normal value 150 to 180mg)
- Classify Enzyme inhibitors? Which type of inhibition takes place by Statin drug
- How enzymes are regulated by covalent modification .5 +.5+1 Q6a.A 56 year-old male on Isoniazid therapy for tuberculosis has developed rashes on the exposed parts of the body. What is the probable cause for these rashes? 1+.5+1.5 +2
b.Name two vitamins & their sources of synthesis in the body other than intestinal flora
- Why are premature babies given vitamin K injections immediately after birth?
d What is visual cycle? What is the role of vitamin A in visual cycle?
Q7.a. what do you understand by omega 3 fatty acids? What are the biological roles 3+2
of thrombaxne A2 ,Prostacycline & Lecukotriens
b.Briefly write the role of selenium as Selenocysteine (amino acid) & as an Antioxidant
Q8. a.Write the Active form , Metabolic role, deficiency disorders of NIACIN & FOLATE 3+2
- Define Nucleotide & Nucleoside; enumerate the derivatives of ADENINE
9 a. Enumerate all GAGS along with their functions 2.5+2.5
b Differentiate b/w
- Kwashiorkor & Marasmus
- Body mass index (BMI) & Basal metabolic rate(BMR)
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