Which of the following is the purpose of connecting a battery in an electric circuit...? Mcqs

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Which of the following is the purpose of connecting a battery in an electric circuit...?

(A) To maintain resistance across the conductor
(B) To vary resistance across the conductors

(C) To maintain constant potential difference across the conductor
(D) To maintain varying potential difference across the conductor

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In plants, water and minerals are transported from roots to the leaves by ____...?

(A) Phloem
(B) Xylem

(C) Stomata
(D) Cambium

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When sugar is added to water, its boiling point:__________...?

(A) Increase
(B) Decrease

(C) Remain unchanged
(D) None of the above

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The artificial manipulation, medication and recombination of DNA ____...?

(A) Genetic engineering
(B) Biotechnology

(C) Molecular Biology
(D) Genetics

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A mixture of sand and naphthalene can be separated by ________ ...?

(A) Chromatography
(B) Fractional distillation

(C) Sublimation
(D) None of these

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The sun has a __________ year solar cycle during which its activity increases and decreases....?

(A) 10
(B) 11

(C) 12
(D) 13

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A person of which of the following blood groups is called a universal donor...?

(A) O
(B) AB

(C) A
(D) B

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The multiplication of new cells takes place by a process known as _____...?

(A) Cell Division
(B) Cell Growth

(C) Cell Differentiation
(D) Cell Specialization

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In eye donation, which one of the following parts of donor’s eye is utilized ...?

(A) Iris
(B) Lens

(C) Cornea
(D) Retina

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Ozone layer thickness is measured in____________...?

(A) Metre
(B) Joule

(C) Pounds
(D) Dobson

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