Which element has the second most % in human body...? Mcqs

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Which element has the second most % in human body...?

(A) Oxygen 65%
(B) Calcium 75%

(C) Hydrogen 10%
(D) Carbon 18%

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Any disease or infection that is naturally transmissible from vertebrate animals to humans is called...?

(A) Zonoses
(B) Zoonoses

(C) Ananoses
(D) Chordnoses

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Enzyme activity decreased by ______...?

(A) Activator
(B) Substrate

(C) Inhibitor
(D) Coenzyme

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Which one among the following is an example of decomposition reaction...?

(A) The formation of hydrogen and oxygen from water
(B) The formation of water from hydrogen and oxygen

(C) The formation of carbon dioxide from carbon and oxygen
(D) The formation of oxygen from nitrogen and oxygen

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Birds exhibits which of the following traits...?

(A) Lay eggs
(B) Warm-blooded

(C) Beak/bill & feathers
(D) Tail, two legs & wings

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Air Conditioning Controls:___________...?

(A) Circulation of the Air
(B) Humidity

(C) Temperature
(D) All of The Above

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Ozone layer prevents ______________ radiation from entering the atmosphere...?

(A) Infra-red
(B) Ultraviolet

(C) X-rays
(D) Gamma rays

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Hydrogen peroxide (H2O2)______________...?

(A) helps line up cell proteins
(B) is poisonous to tissues

(C) is often needed as a catalyst
(D) aids in oxidation of glucose

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Following are examples of convex mirrors except ____...?

(A) Rear-view mirror
(B) Dentist mirror

(C) Blind Corner mirror
(D) Security mirror

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Sunlight is made of__________colours...?

(A) Seven colours
(B) Five colours

(C) Three colours
(D) Non of these

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