AP BIOLOGY

Detailed explanation-1: -An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.

Detailed explanation-2: -Answer and Explanation: A type of protein critical to all cells is organic catalysts called enzyme. Enzymes are biocatalysts and all enzymes are proteins that increase the rate of biochemical reactions occurring within all living cells by lowering the activation energy.

Detailed explanation-3: -An enzyme is defined as an organic catalyst for biochemical processes. A catalyst is a substance that speeds up a chemical reaction but is not consumed or altered in the process.

Detailed explanation-4: -Although an enzyme generally consists of protein, a few enzymes contain non-protein components such as nucleic acid. The ribozyme discovered by Thomas Cech and others in 1986 is a catalyst made of RNA, which acts on itself and cleaves RNA.

Detailed explanation-5: -An enzyme is an organic molecule (usually a protein) that catalyzes a cellular reaction.