Assam University 2008 B.Sc Zoology TDC Part-II Honours Sixth - Question Paper

NTS-08/ZOOH-6/060
2008
ZOOLOGY (Honours)
6th Paper
(Techniques in Biology, Molecular Biology and Immunology, Histology, Biostatistics, Radiation Biology and Toxicology)

TDC Part-II (new Syllabus)
Full Marks : 70
Pass Marks : 21

Time : three Hours

The figures in the margin indicate full marks for the ques.

1. Elucidate the basic principle of electron microscopy. How Transmission electron microscope differs from that of Scanning electron microscope? explain the preparatory techniques of specimen for scanning electron microscopy. 4+3+7 = 14

Or

What is fixation? elaborate its utility in biological studies? Mention the general properties of chemical fixatives. Cite 4 common fixatives with chemical composition of every. 2+3+5+4 =14

2. (a) elaborate meant by cloning vectors? Mention commonly used varieties of such vectors. Comment on their role in recombinant DNA technology. 2+4+3 =9
(b) provide an illustrative note on Transgenic animals. 5

Or

elaborate immunoglobulins? define the structure and functional significance of immunoglobulins. Add a brief note on autoimmune diseases. 2+4+5+3 =14

3. What is meant by intervertebral disc? define the detailed histological structure and kinds of cartilage with neat labelled diagrams. 2+5+7 =14

Or

(a) What is meant by standard error? elaborate the significance of the value of standard fault in statistical analysis? 2+2 = 4
(b) What is linear regression analysis? Mention the linear regression formula. 2+2 = 4
(c) compute the standard deviation and coefficient of variation of the subsequent frequency distribution: 4+2 = 6

Class interval : one - five six - 10 11 - 15 16 - 20 21 - 25
Frequency seven 10 16 32 24

Class interval : 26 - 30 31 - 35 36 - 40 41 - 45
Frequency 18 10 five 1



4. What is ionising radiation? Elucidate adverse effects of ionising radiations on man. Write
briefly on preventive measures to be adopted for protection against radiation exposure. 2+8+4= 14

Or

explain any 2 of the subsequent : seven x two = 14

(a) Anthropogenic sources of radiation to the environment
(b) Risks of mutagenesis from radiation exposure
(c) Uses of radio-active isotopes in medical diagnosis and therapy

5. describe toxicology. Enumerate the toxic metallic elements that are current in the industrial
effluents. explain their sources, emissions and toxic effects. 2+3+9 = 14

Or


Write short notes on the following: 4+3+4+3 = 14

(a) Biomonitoring (b) Occupational hazards
(c) Bio-indicators for environmental monitoring
(d) Bio-transformation of xenobiotics.

Earning:   Approval pending.