Choose the correct statement regarding lock and key model...? Mcqs

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Choose the correct statement regarding lock and key model...?

(A) Enzyme and substrate posses' specific complementary geometric shapes
(B) Active site of enzyme is flexible

(C) Active site continuously changes
(D) All above statements are correct

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The SI unit of Heat is________...?

(A) Watt
(B) Volt

(C) Joule
(D) Newton

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_______ are used to put satellites into orbits....?

(A) Helicopter
(B) Aeroplane

(C) Rocket
(D) None of these

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The activity in relation to changes in environment is ______...?

(A) Stimulus
(B) Response

(C) Both a & b
(D) None of these

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Transistor is a device that convert weak signal into__________...?

(A) small signal
(B) strong signal

(C) both
(D) none

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Select the odd one of the followings...?

(A) Active transport
(B) Diffusion

(C) Facilitated diffusion
(D) Osmosis

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Humming bird belongs to a category called ...?

(A) Ectotherm
(B) Endotherm

(C) Exotherm
(D) Heterotherm.

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What is the percentage of salt water on earth surface...?

(A) 93%
(B) 95%

(C) 97%
(D) 76%

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Which gas is transported out of the leaf into the air...?

(A) Carbon Dioxide (CO2)
(B) Nitrogen (N2)

(C) Water Vapor (H2O)
(D) Oxygen (O2)

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The only living cells in the body without blood supply is___________...?

(A) Pupil
(B) Nail

(C) Cornea
(D) Hair

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