Phosphorus is an essential component of one of the following biological molecules:...? Mcqs

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Phosphorus is an essential component of one of the following biological molecules:...?

(A) Amino acids
(B) Nucleic acids

(C) Carbohydrates
(D) None

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_________ extends from the top of the troposphere to the bottom of the mesosphere....?

(A) Thermosphere
(B) Ionosphere

(C) Stratosphere
(D) None of the above

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Plant have ________ while animals lack it....?

(A) starch
(B) cellulose

(C) protein
(D) fat

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Fertilizers are substances containing chemical elements such as manure or mixture of ______...?

(A) Lipids
(B) Carbohydrates

(C) Nitrates
(D) Proteins

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An adult have permanent teeth...?

(A) 30
(B) 40

(C) 50
(D) 32

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Sound travel faster in solid as compare to gases because of ______...?

(A) Gas molecules are packed loosely
(B) Sound does not travel faster through a solid than a gas

(C) Solid molecules are packed tightly
(D) Gas molecules move faster

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Potato, wheat, rice, corn and all types of sweet fruits contain...?

(A) Mineral
(B) Vitamin

(C) Protein
(D) Carbohydrates

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In which of the following, speed of the sound is maximum...?

(A) Gold
(B) Sea water

(C) Air
(D) Space

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Which living thing would decrease, if the number of frogs increased...?

(A) Hawks
(B) Snakes

(C) Plants
(D) None

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If a machine performs 20 J of work in 10 sec. then it power is ______...?

(A) 200 watt
(B) 20 watt

(C) 2 watt
(D) 0.2 watt

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