In plants, the cell wall is composed mainly of strong fibers of ____...? Mcqs

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In plants, the cell wall is composed mainly of strong fibers of ____...?

(A) Cellulose
(B) Starch

(C) Proteins
(D) Lipids

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Cataract is a disease of ________...?

(A) Eyes
(B) Throat

(C) Lungs
(D) Circulatory system

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Disolved oxygen (DO) in water should be...?

(A) 400 to 800 ppm
(B) 4000 to 8000 ppm

(C) 0.4 to 0.5 ppm
(D) 4 to 5 ppm

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The cooling fins at the back of refrigerator are made of black and rough surface because ____...?

(A) They are good conductors of heat
(B) They are good radiators of heat

(C) They are good insulators of heat
(D) They are not important for heat transfer

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The chemicals released from one cell and carried to signal some distant cell through blood are ______...?

(A) Neurotransmitters
(B) Enzymes

(C) Hormones
(D) All of these

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Wind energy is the __________ energy....?

(A) Potential
(B) Transverse

(C) Kinetic
(D) Mechanical

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1 BTU(British thermal unit) is equal to___________...?

(A) 955 joules
(B) 990 joules

(C) 1055 joules
(D) 1211 joules

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EEG is used for diagnosing ailments connected with...?

(A) Heart
(B) Brain

(C) Kidneys
(D) Lungs

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First antibiotic was extracted from a _________...?

(A) Bacteria
(B) virus

(C) Fungus
(D) None of these

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Which best describes milk...?

(A) Slightly Acidic
(B) Slightly Basic

(C) Strongly Acidic
(D) Strongly Basic

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