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 quantities that cannot be explained in terms of other quantities are known as ____...?

(A) Derived physical quantities
(B) Mathematical quantities

(C) Fundamental physical quantities
(D) None

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Synthetic resins are used on places where _______...?

(A) Electric resistance is required
(B) Water resistance is required

(C) Adhesion is required
(D) Friction is required

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When the magnet is suspended freely, its north and south poles are always pointed towards...?

(A) North and South poles of earth respectively
(B) North and South poles of earth in the opposition direction

(C) East and West of earth respectively
(D) East and West of earth in opposite direction

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Boiling point of pure water is __________...?

(A) 90’C
(B) 97’C

(C) 100’C
(D) None of these

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The central atom of hemoglobin is...?

(A) Calcium
(B) Magnesium

(C) Iron
(D) None of these

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When two surfaces move or slide over each other, they experience:...?

(A) Gravitational force
(B) Centripetal force

(C) Electrostatic force
(D) Frictional force

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Salt among following is ______...?

(A) HCl
(B) KCl

(C) HNO3
(D) H2SO4

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A light year is a unit of ...?

(A) Time
(B) Energy

(C) distance
(D) Mass

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Which metal pollute the air of a big city...?

(A) Copper
(B) Chromium

(C) Lead
(D) Cadmium

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