SSC Biology Previous year questions Set 25

241. ‘ELISA’ test is employed to diagnose : [SSC CGL Prelim 2000]
A. Polio virus
B. AIDS antibodies
C. Tuberculosis bacterium
D. Cancer
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242. Why excessive heating and repeated use of cooking oil is most undesirable?[SSC CGL Prelim 2000]
A. The oil vapours can cause indoor pollution
B. Carcinogenic substances like benzpyrene are produced
C. Nutrient value of food is lost
D. Loss and wastage of oil
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243. Which one of the following is a female sex hormone?[SSC CGL Prelim 2000]
A. Estrogen
B. Androgen
C. Oxytocin
D. Insulin
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244. What kind of soil is treated with gypsum to make it suitable for cropping?[SSC CGL Prelim 2000]
A. Alkaline
B. Acidic
C. Water-logged
D. Soil with excessive clay content
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245. Clove, the commonly used spice, is obtained from the :[SSC CGL Prelim 2000]
A. root
B. stem
C. flower bud
D. fruit
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246. Reserpine is used to : [SSC CGL Prelim 2000]
A. reduce high blood pressure
B. increase blood pressure when it is low
C. alleviate pain
D. cure arthritis
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247. A ‘breath test’ used by traffic police to check drunken driving uses:[SSC CGL Prelim 2000]
A. potassium dichromate-sulphuric acid
B. potassium perma-nganatesulphuric acid
C. turmeric on filter paper
D. silica gel coated with silver nitrate
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248. Labourers who do hard manual labour develop thick skin on their palms and soles due to : [SSC CGL Prelim 2000]
A. thick epidermis
B. thick dermis
C. thick subcutaneous tissue
D. All of these
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249. Maximum photosynthetic activity occurs in :[SSC CGL Prelim 2000]
A. blue and red region of light
B. green and yellow region of light
C. blue and orange region of light
D. violet and orange region of light
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250. AIDS virus has : [SSC CGL Prelim 2000]
A. single-stranded RNA
B. double-stranded RNA
C. single-stranded DNA
D. double-stranded DNA
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