(a) Why do viruses do not show characteristics of life until they enter a living body?
(b) Which cell organelle detoxifies poisons and drugs in the liver of vertebrates?
(c) A plant cell was placed in a solution X. After sometime it was observed that the cell was swollen, but it did not burst.
(i) In what type of solution was the cell placed?
(ii) Name the process by which the water enters the cell.
(iii) Which part of the plant cell protects it from bursting?
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Smooth endoplasmic reticulum in liver cells of vertebrates helps in detoxifying poisons and drugs. It contains enzymes that catalyze a number of reactions that can make lipid-soluble drugs and metabolic wastes into water-soluble so that these can easily be expelled out from the body. To perform such processes SER increases or doubles its surface area so lots of detoxification can take place.
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