Assam University 2007 B.Sc Zoology TDC Part-II Honours --- Sixth - Question Paper

NTS-07/ ZOOH-6 /060

2007
ZOOLOGY (Honours)
Sixth Paper
(Techniques in Biology, Molecular Biology and Immunology, Histology, Biostatistics, Radiation Biology and Toxicology)
TDC Part-II

Full Marks : 70
Pass Marks : 21

Time : three hours

The figure in the margin shows full marks for the ques.

ans all ques.

1. explain the salient features of phase contrast microscopy emphasizing on the configuration
of the instrument. elaborate the advantages and disadvantages of phase-contrast
microscopy? Add a brief note on dark-field microscopy. 7+3+4 = 14
OR
(a) What is Rf value in chromatographic techniques? Mention the factors that may reason
variation in Rf value. explain briefly the technique of paper chromatography. 2+2+6=10
(b) provide a brief note on the technique of autoradiography. 4

2. (a) What is meant by complementary DNA? Mention the role of restriction endonucleases
in the process of recombinant DNA technology. Elucidate the technique of DNA
fingerprinting. 2+2+6=10
(b) Write briefly on immunoglobulins. 4
OR

What is AIDSW? explain the possible paths of transmission of HIV from infected person to
the others. elaborate the preventive measures prescribed to curb the menace of spreading of
the infection among the mass population? 2+6+6 = 14

3. define with suitable diagram the detailed histological structure and cell kinds of
mammalian bone with special emphasis on Haversian system. 6+4+4 = 14
OR
(a) describe mode. How it can be calculated? 2+2 = 4
(b) What is standard deviation? How does it differ from mean deviation? 2+2 = 4
(c) calculate the value of coefficient of correlation ranging from 2 variables X and Y of the
subsequent data. Interpret on your result: five + one = 6

X : 10 12 15 11 18 20 14 16 19 15

Y : 20 18 22 25 19 20 26 28 15 27

4. Differentiate ranging from ionizing and non-ionizing radiations. elaborate the natural sources of
radiations to the environment? explain the delayed biological effects of radiation exposure.
3+4+7=14
OR
explain any 2 of the following: seven x two = 14
(a) Adverse effects of UV radiation
(b) Radio-wastes generated by nuclear power plants
(c) Risks of carcinogenesis from radiation exposure.

5. What is meant by antidote? explain principal kinds of air pollutants and their ill effects on
man. Add a brief note on prevention and control measures of air pollution. 2+8+4=14
OR
Write notes on the following: 5+5+4 = 14
(a) Objectives of biological monitoring programme
(b) Types of pollutants generated by automobile exhausts.
(c) Occupational health hazards

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Earning:   Approval pending.