Q. All are characteristics of energy, but,

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Q. All is true for resting organisms, but,

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Q. Enzymes catalyze biochemical processes occurring in living cells, in

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Q. Sucrose is broken down into glucose (C₆H₁₂O₆) and fructose (C₆H₁₂O₆) through enzyme

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Q. Substances on which enzymes act are known as

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Q. Building up and breaking down reactions can be called as

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Q. Pulmonary veins carry

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Q. When an artery dilates the

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Q. In mammals, Endothelium is

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Q. When the heart relaxes,

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Q. Veins do not require thick walls

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Q. In veins, the blood pressure is

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Q. Blood is carried back to the heart through

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Q. Thick, muscular and elastic walls are characteristics of

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Q. In a human body, arteries

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Q. Blood flows through a closed system in

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Q. Blood vessels which carry blood from arteriole to venule is

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Q. In transportation system of mammals ,Arterioles is

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Q. Microscopic blood vessel found between the cells of all tissues are

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Q. In cardiac system, Aorta originates from the

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