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Dna Technology-2007 Question Paper

Dna Technology-2007 

Course:Bachelor Of Science In Biochemistry

Institution: Egerton University question papers

Exam Year:2007



BIOC 409: DNA TECHNOLOGY CAT 1 40 min 15marks

1.a) Use diagrams to show how the pentose sugars in DNA and RNA differ.(2 marks)

b) What is the basic structure of a nucleoside? Write the structure of a ribonucleoside containing 5-mathly cytosine.(2 marks)

c) Why does a DNA polynucleotide have different ends?(2 marks)

2.Briefly describe how the x-ray diffraction technique was used to elucidate the secondary structure of DNA.(4 marks)

3.Why does supercoiled DNA migrate faster through a gel matrix compared to relaxed circular DNA or linear DNA?(2 marks)

4.What are the functions of nucleotides in the cell?(3 marks)

BIOCHEMISTRY & MOLECULAR BIOLOGY DEPARTMENT

BIOC 202:BASIC METABOLIC 11

CAT 1

TIME:12-1 pm

1.Ruminants produce propionate as one of the products of carbohydrate metabolism.Outline the synthesis of glucose from propionate.(10 marks)

2.Explain why ketone bodies are formed in diabetes mellitus patients and their significance in them.(10 marks)

6.Explain,with illustration,why the net energy obtained from ß-oxidation of palmitate is higher than from palmitoleate.(5 marks)




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