Andhra University 2006 M.Sc Microbiology - university paper

[SMB-S-301]

M.Sc. DEGREE exam

3rd Semester

Microbiology

MOLECULAR BIOLOGY

(Revised regulatons effective from 2005-2006 admitted batch)

Time: 3 hours Maximum:85 marks

1. Write short notes on any 5 of the following:
(5*5=25)

(a) Blender`s experiment.
(b) Constitutive genes
(c) Primers
(d) Inhibitors of DNA replication
(e) Central dogma theory
(f) Codon redundancy
(g) Negative and positive regulation of gene expression
(h) Catabolic repression

UNIT-I

2.
(a) explain the concept of the genes. . (15)

Or
(b) discuss the role of oncogenes and antioncogenes in tumerogenesis.


UNIT-II

3.
(a) define the organization and transcription of rRNA and tRNA encoding genes

Or (15)

(b) How does ssDNA genomes replicate ?

UNIT-III

4.
(a) discuss the targetting of proteins and their accurate destinations in eukaryotes

(15)

Or

(b) Write on mode of action of inhibitor of protein biosynthesis


UNIT-IV

5.
(a) How the expression of nif genes is regulated in bacteria? [SMB-S-301]

M.Sc. DEGREE exam

Third Semester

Microbiology

MOLECULAR BIOLOGY

(Revised regulatons effective from 2005-2006 admitted batch)

Time: 3 hours Maximum:85 marks

1. Write short notes on any 5 of the following:
(5*5=25)

(a) Blender`s experiment.
(b) Constitutive genes
(c) Primers
(d) Inhibitors of DNA replication
(e) Central dogma theory
(f) Codon redundancy
(g) Negative and positive regulation of gene expression
(h) Catabolic repression

UNIT-I

2.
(a) explain the concept of the genes. . (15)

Or
(b) discuss the role of oncogenes and antioncogenes in tumerogenesis.


UNIT-II

3.
(a) define the organization and transcription of rRNA and tRNA encoding genes

Or (15)

(b) How does ssDNA genomes replicate ?

UNIT-III

4.
(a) discuss the targetting of proteins and their accurate destinations in eukaryotes

(15)

Or

(b) Write on mode of action of inhibitor of protein biosynthesis


UNIT-IV

5.
(a) How the expression of nif genes is regulated in bacteria? (15)

Or

(b) discuss the organization and regulation of expression of trp operon



Or

(b) discuss the organization and regulation of expression of trp operon

Earning:   Approval pending.