SSC Biology Previous year questions Set 32

311. On the average, what percentage of human body has the element of oxygen ?[SSC Section Officer (Commercial Audit) 2003]
A. 65
B. 25
C. 10
D. 5
Answer –A. 65

312. Glaucoma is a disease of the____. [SSC Section Officer (Commercial Audit) 2003]
A. Skin
B. Lungs
C. Liver
D. Eyes
Answer – D. Eyes

313. Which among the following bears smallest living cell ? [SSC Section Officer (Audit) 2003]
A. Bacterium
B. Mollusc plasma
C. Virus
D. Yeast
Answer –A. Bacterium (Mycoplasma)

314. The chemical used for destroying Fungi in water tanks is: [SSC Section Officer (Commercial Audit) 2003]
A. Copper sulphate
B. Magnesium sulphate
C. Zinc sulphate
D. Nitric acid
Answer – A. Copper sulphate

315. Dehydration in human body is caused due to the deficiency of___.[SSC Section Officer (Audit) 2003]
A. Vitamin
B. Salt
C. Hormone
D. Water
Answer – D. Water

316. Human kidney disorder is caused by the pollution of–[SSC Section Officer (Audit) 2003]
A. Cadmium
B. Iron
C. Cobalt
D. Carbon
Answer –A. Cadmium

317. Yawning occurs___ [SSC Section Officer (Audit) 2003]
A. due to excess concentration of CO2 in blood
B. due to excess concentration of CO2 in lungs
C. due to excess concentration of O2 in lungs
D. None of these
Answer –A. due to excess concentration of CO2 in blood

318. The source of oxygen generated during photosynthesis is :[SSC CGL Prelim 2004]
A. water
B. carbon dioxide
C. chlorophyll
D. mesophyll cells
Answer –A. water

319. Which among the following living being has respiratory organ, but does not have brain?[SSC Section Officer (Audit) 2003]
A. crab
B. starfish
C. blood succor
D. silverfish
Answer –B. starfish

320. Who among the following analysed DNA for the first time ?[SSC Section Officer (Audit) 2003]
A. Arthur Cornberg
B. Hargobind Khurana
C. M. W. Nirenberg
D. Watson and Krick
Answer –D. Watson and Krick

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