Tamil Nadu Dr MGR Medical University 2006 M.B.B.S Biochemistry II - - Question Paper

FIRST M.B.B.S. DEGREE EXAMINATION,

Revised (N on-S <t master) Regulations

Paper VI BIOCHEMISTRY II Time : Three hours    Maximum : 100 marks

Theory : Two hours and    Theory : SO marks

forty minutes

M.C.Q.: Twenty minutes    M.C.Q.: 20 marks

Draw labelled diagrams wherever necessary. Answer ALL questions.

.1. Essay:

(1)    Describe the sources, requirement, absorption, transport, storage forms, functions, deficiency and toxic manifestations of iron.

(1+ l + 3 + 2 + 2 + 4 + 5 + 2 = 20)

(2)    Discuss urea cycle under the following headings:

(a)    Site

(b)    Sources of amino group

(c)    Steps and

(d)    Regulation.    (1 + 1 + 10 + 3 = 15)

II. Write short notes on;    {6x5 = 30)

(a) Post translational modifications with two examples.

Cb) Alpha helical structure of a peptide.

(c)    Buffer system in the body.

(d)    Principles of electrophoresis and its clinical applications.

(e)    Applications of genetic engineering.

(f)    G-protcina,