M.Sc. (Semester III) (CBCS) Examination Mar/Apr-2018
Zoology
MOLECULAR CYTOGENETICS
Time: 2½ Hours
Max. Marks: 70
Instructions: Question number 2 and 6 are compulsory. Attempt any two from Question No. 4 and 5.
Q.1
Multiple choice questions (Per question 2 marks) (Compulsory):
14
In Prokayotes Chromatin is formed of
Nucleic acid and proteins
Nucleic acid and carbohydrates
Nucleic acid and lipids
Only Nucleic acid
Genetically inactive areas of chromosomes are called
Euchromatin
Heterochromatin
Allochromosome
Telomere
Nucleosome core particle is a of basic histones.
Tetramer
Hexamer
Octamer
Decamer
The coding sequences in DNA are called
exons
recons
histones
introns
Pseudominance is seen during
Duplication
Deletion
Translocation
Inversion
is virus-mediated bacterial DNA transfer.
Transformation
Conjugation
Transduction
Translocation
The sex ratio of a normal female in Drosophila is
0.5
1.0
1.5
0.2
Q.2
How is Cell cycle regulated? Explain molecular basis of cellular check points.
14
Q.3
Answer the following.
Describe cytogenetic effects of non ionizing radiation.
07
Genic balance theory.
07
Q.4
Explain the following.
Automated Karyotyping
05
Transposable elements and their features
05
FISH
04
Q.5
Explain in short
Chromosomal structural aberrations
07
Metabolic disorders with an example.
07
Q.6
Write short notes on any four of the following:
14
Conjugation in bacteria
Histones
Barr bodies
Telomere
Imprinting of chromosomes
DNA ligases.