Root hair is long, thin and tubular structure, it increases surface area which increases the _____...? Mcqs

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Root hair is long, thin and tubular structure, it increases surface area which increases the _____...?

(A) Rate of absorption of water
(B) Rate of photosynthesis

(C) Rate of respiration
(D) Rate of growth

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The setting sun often looks oval in the shape because of__________...?

(A) The fact that sun really becomes oval in the evening
(B) Refraction of rays of sun passing through the atmosphere

(C) Optical Illusion
(D) Dispersion

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Weather describe the condition of ______ at any one time....?

(A) The earth
(B) The land surface

(C) The atmosphere
(D) The ionosphere

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Which of the following is the reason of global warming...?

(A) Presence of sulphite
(B) Rise in CO2 concentration

(C) Oxides of nitrogen
(D) Formtion of ozone

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A loudspeaker changes _________ energy into sound energy....?

(A) Chemical
(B) Electrical

(C) Light
(D) Kinetic

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Ions are charged particles of atoms and form negative and positive charges due to ____...?

(A) Proton
(B) Electron

(C) Neutron
(D) None

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Radioactivity was discovered by __________...?

(A) Kelvin
(B) Thomson

(C) Rutherford
(D) Bacquerel

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A pulsar is actually a___________...?

(A) Black hole
(B) White dwarf

(C) Red giant
(D) Neutron star

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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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Gel electrophoresis is used in...?

(A) Amplifying DNA
(B) Sequencing DNA

(C) Separating DNA fragments on the basis of size
(D) Cloning DNA

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