Why does cytosine not form a bond with adenine...? Mcqs

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Why does cytosine not form a bond with adenine...?

(A) Cytosine is unable to form hydrogen bonds with adenine.
(B) Adenine and cytosine have incompatible hydrogen bond donors and acceptors.

(C) Cytosine only pairs with thymine due to their complementary structures.
(D) Adenine is a pyrimidine and cannot bond with cytosine.

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What is used in making of alloys...?

(A) Gypsum
(B) Granite

(C) Chromium
(D) Lime-stone

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The earth’s ___________ is divided into 15 major plates of various sizes...?

(A) Mesosphere
(B) Stratosphere

(C) Lithosphere
(D) None

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Water has high density and minimum volume at__________...?

(A) 0°C
(B) 4°C

(C) 100°C
(D) None of these

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The defect in which the image is formed beyond the retina is called...?

(A) Long-sightedness
(B) Blind spotting

(C) Short-sightedness
(D) Image defect

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The green pigment present in leaves is called...?

(A) Chloroplast
(B) Chromoplast

(C) Chlorophyll
(D) None

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The Earth takes ______ to revolve around the sun....?

(A) 365 days and 4 hours
(B) 365 days and 6 hours

(C) 365 days and 8 hours
(D) 365 days and 10 hours

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What type of Energy does spring have...?

(A) Elastic Potential Energy
(B) Kinetic Energy

(C) Potential Energy
(D) None of the above

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Epsom salt is chemically known as_________...?

(A) Copper Sulfate
(B) Magnesium Sulfate

(C) Ferrous Sulfate
(D) None of these

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Chlorophyll contains _____metal....?

(A) Iron
(B) Calcium

(C) Magnesium
(D) Potassium

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