Class 11 · Biomolecules

Enzymes and Ribozymes: Catalysts — NEET Biology

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Enzymes are proteins which catalyse biochemical reactions in the cells. Ribozymes are nucleic acids with catalytic power. Proteinaceous enzymes exhibit substrate specificity, require optimum temperature and pH for maximal activity. They are denatured at high temperatures. Enzymes lower activation energy of reactions and enhance greatly the rate of the reactions. Nucleic acids carry hereditary information and are passed on from parental generation to progeny.

NCERT Biology · Class 11 · Chapter 9 · Paragraph 70
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Assertion (A): Each enzyme shows optimal activity under specific environmental conditions. Reason (R): Enzymes are proteins which catalyse biochemical reactions in the cells.

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