58SCIENCE REPORTER, FEBRUARY 2015

L. K. BEHERA AND T. K. S. RAO

TEST

YO

UR K

NO

WLE

DG

E

1. Thickness of ozone layer is measured ina. Dobson unit b. UV raysc. CFC unit d. Ozone hole

2. Ozone deple on in stratosphere marked over the Antarc c region is commonly calleda. Dobson unit b. UV raysc. CFC unit d. Ozone hole

3. Ozone layer is degraded mainly bya. N2O b. O2c. CFCs d. H2SO4

4. Tradi onal slash-and-burn agro-forestry followed in North eastern states of India is commonly known asa. Grazing cul va on b. Jhum cul va onc. Organic cul va on d. Silviculture

5. Green house gases (GHGs) are a. CO2 b. CH4c. N2O d. All of the above

6. Increase in concentra on of toxicant at successive trophic level is a. Eutrophica on b. Bio-magnifi ca onc. Biochemical oxygen demand d. All of the above

7. CNG used as fuel in vehicle is a. Coloured nitrogen gas b. Control novel gasc. Compressed natural gas d. None of the above

8. Nutrient enrichment of an old lake is known as a. Bio-magnifi ca on b. Eutrophica onc. BOD d. COD

9. Environmental protec on act in India was passed in year a. 1981 b. 1972c. 1986 d. 2002

10. High noise pollu on can be controlled by a. Ear muff s b. Noise barrierc. Both of the above d. Nose plug

11. Extensive plan ng of tree to improve environment quality is a. Aff oresta on b. Foresta onc. Deforesta on d. Urbaniza on

12. Domes c sewage is rich in a. Nitrogen b. Phosphorusc. Both of the above d. Iron

13. Acid rain is caused bya. NO2 b. SO2c. Both of the above d. Zn

14. Corroding of historical monuments like Taj Mahal (Marble cancer) is due toa. NO2 b. SO2c. Both of the above d. Zn

15. Degrada on or yellowing of Taj Mahal can be protected by using a. CNG b. LPGc. Unleaded petrol d. All of the above

16. Rise in global temperature due to higher concentra on of CO2 gas isa. Green house eff ect b. Eutrophica onc. Bio-magnifi ca on d. Urbaniza on

17. Ozone hole in region of Antarc ca is prevalent during the month ofa. December to January b. August to Novemberc. February to April d. May to July

18. e-wastes area. Discarded computers b. Mobile phonesc. Cathode Ray Tubes d. All of the above

19. Cataly c converters used to convert the common pollutants area. CO b. Unburned hydrocarbonc. NO d. All of the above

20. Bhopal gas tragedy was due to a. MIC b. SO2c. NO2 d. CO

21. Kyoto protocol 1997 is related with a. Soil erosion b. Carbon da ngc. Reduce green house gas emissions d. Water evapora on

22. Second major layer of atmosphere above troposphere about 12-50 km, isa. Tropopause b. Stratospherec. Mesosphere d. Thermosphere

Answer:1.a 2.d 3.c 4.b 5.d 6.b 7.c 8.b 9.c 10.c 11.a 12.c 13.c 14.c 15.d 16.a 17.b 18.d 19.d 20.a 21.c 22.b

Contributed by L. K. Behera, Department of Silviculture, College of Forestry,Navsari Agricultural University, Dandi Road, Navsari, Gujarat-396450 and T. K. S. Rao, Department of LPM, College of Veterinary Science & Animal Husbandry, Navsari Agricultural University, Navsari

59 SCIENCE REPORTER, FEBRUARY 2015

TEST YOUR KNOWLEDGE

HAREKRUSHNA JENA AND BISWAJIT RATH 1. The average radius of prokaryo c cell is(a) 0.5 – 2.0 micrometer (b) 1.0 – 4.0 micrometer(c) 1.0 – 10.0 micrometer (d) 5.0 – 10.0 micrometer(e)10 – 30.0 micrometer

2. The minimum me used for steriliza on by autoclaving is(a) 5 minutes (b) 15 minutes(c) 45 minutes (d)1 hr(e) 2 hrs

3. When all microorganisms are removed or killed on or in an item, this is called(a) Cleansing (b) Decontamina on (c) Disinfec on (d) Sani za on(e) Steriliza on

4. Which of the following microscopic techniques provides 3D-images of a bacterial cell(a) Nega ve staining microscopy (b) Dark-fi eld microscopy(c) Scanning electron microscopy (d) Fluorescent microscopy(e) Transmission electron microscopy

5. Microwave ovens will only heat materials that contain(a) Protein (b) Lipid(c) Materials, such as calcium or iron (d) Food containing substrates (e) Water

6. A laboratory bench with bacteria spilled on it could be correctly referred to as what?(a) Infected (b) Contaminated(c) Infested (d) Diseased(e) Infl amed

7. When determining distances and sizes, the smallest unit of measure is the(a) Millimeter (b) Micrometer(c) Cen meter (d) Decimeter(e) Nanometer

8. The presence of a few, non mul plying, bacteria in the blood is termed(a) Viremia (b) Sep cemia(c) Bacteremia (d) Toxemia(e) Secondary infec on

9. The fi rst regular and accepted use of an microbial and chemotherapeu c drugs was(a) To treat malaria (b) To control polio(c) To control syphilis(d) The use of vancomycin injec ons(e) With the development of penicillin

10. An bio cs are(a) Chemical substances that can only interfere with cell wall synthesis of the pathogen(b) Chemical produced by one microorganism that inhibits other microorganisms(c) Ar fi cial chemicals used to combat infec ons(d) Chemical substances used to treat fl u infec ons(e) Toxin produced by immune reac ons

11. The process by which microbes disturb the normal health and func ons of the host is(a) Mutualism (b) Disease(c) Infesta on (d) Infec on(e) Contamina on

12. The best descrip ve term for resident micro fl ora (commonly found in intes ne) is (a) Parasites (b) Pathogens(c) Infesta on (d) Commensals(e) Mutualists

13. The capacity to cause a disease termed(a) Pathogenicity (b) Virulence(c) A enua on (d) Passage(e) Symbiosis

14. The percentage of individuals who are aff ected by a specifi c disease is referred to as(a) Incidence rate (b) Disease rate(c) Morbidity (d) Mortality(e) A ack rate

15. Hospital-acquired infec ons are called(a) No fi able diseases (b) Nosocomial infec ons(c) Pathogens (d)Staphylococcal infec ons (e) Transient infec ons

16. Universal precau ons apply to all of the following bodily fl uids except(a) Tears (b) Blood(c) Semen (d) Cerebrospinal fl uid(e) Amnio c fl uid

ANSWERS:1. b 2. b 3. e 4. c 5. e 6. b 7.e 8. c 9. c 10. b 11. d 12. d 13. a 14.c 15. b 16. a

Contributed by Harekrushna Jena (jena_harekrushna@yahoo.in) and Dr. Biswajit Rath (brath_2000@yahoo.com), Department of Biosciences and Biotechnology, Fakir Mohan University, Nuapadhi, Balasore-756020, Odisha