Free radicals

A May arise by absorption of radiant energy
B Antioxidants block free radical formation
C May cause peroxidation of lipids within plasma membrane
D Are not a byproduct of metabolism
E Can only form in the presence of oxygen

Correct Answer: May arise by absorption of radiant energy, Antioxidants block free radical formation, May cause peroxidation of lipids within plasma membrane

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#Basic Science #MD #MS #Pathology #Cell injury & adaptations #Free radicals

Related Questions

Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these
Removal of free radicals occur by
A Antioxidant
B Superoxide dismutase
C Transferrin
D Calcium
E Nitric Oxide
Free radicals are removed from the cells by the action of
A Superoxide dismutase
B Transferrin
C Glutathione
D Endonuclease
E Vitamin B12
Free radicals are generated
A During inflammation
B By enzymatic metabolism of drugs
C During normal metabolic processes
D By glutathione
E By ceruloplasmin
Free radicals are formed in the body
A By absorption of X-rays
B During metabolism
C By the formation of reactive oxygen species
D By superoxide dismutases
E By vitamin E
Systems that operate to inactivate free radicals are
A Glutathione peroxidase
B Superoxide dismutase
C Vitamin C
D Hydrogen peroxide
E Myeloperoxidase
At the end of given passage , some inferences drawn or supposed to be drawn from the paragraph are given. On the basis of the study of the paragraph, point out whether the inferences is- (a) Definitely true (b) Definitely false (c) probably true (d) probably false (e) can't say. Political freedom is incomplete and had little meaning without economic independence. Until the battle for economic independence is won, the emerging nation will be subjected to external pressure, which must be resisted. Bangladesh though herself in the throes of development has assisted the developing nations. Politically free countries must be economically free.
A Definitely true
B Definitely false
C probably true
D probably false
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by
A Biological oxygen pond
B Aerated lagoons
C Trickling filters
D Gravity separator having oil skimming devices
The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be (where D is the depth of flow)
A 0.423 D
B 0.577 D
C 0.223 D
D 0.707 D
"He was a free-will agent"- What does the word 'free-will' mean?
A reluctant
B enforced
C autonomy
D involuntary

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