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Gene Expression And Regulation Question Paper

Gene Expression And Regulation 

Course:Bachelor Of Science

Institution: Kenyatta University question papers

Exam Year:2009



KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE (BIOCHEMISTRY/BIOTECHNOLOGY)

SBC 314:
GENE EXPRESSION AND REGULATION


DATE: Tuesday, 22nd December, 2009

TIME: 11.00 a.m. – 1.00 p.m.
------------------------------------------------------------------------------------------------------------
INSTRUCTIONS:
Section A:
Answer any TWO questions
(20 marks each)
Section A
(40 Marks)
Answer any TWO questions.
1.
Explain a general model of an inducible operon.


(20 marks)

2.
Discuss translation in prokaryotic
cell. (20
marks)

3.
Explain the differences between the initiation stage of the transcription in
prokaryotes
and
eukaryotes
(20
marks)

Section B
(30 Marks)
Answer ALL questions.
4.
Explain five examples of post-translational modification of proteins











(10 marks)
Page 1 of 2



5.
Describe the structure of E. coli RNA Polymerase in relation to its functions










(10 marks)

6.
An artificial mRNA is synthesized using a reaction mixture containing equal
amounts of ADP and UDP. What proportion of its codons would code for:
a)
Isoleucine
b)
Leucine
c)
Phenylanine
d)
Tyrosine (Refer to the provided code chart)
(10 marks)

Page 2 of 2




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