Catalase, one of the fastest known enzymes, catalyses the breakdown of
Correct answer: D. hydrogen peroxide into water and oxygen
- A. starch into maltose
- B. protein into amino acids
- C. fat into fatty acids and glycerol
- D. hydrogen peroxide into water and oxygen
Explanation
A single catalase molecule can decompose millions of molecules of hydrogen peroxide per minute, which is necessary because the peroxide produced during metabolism would otherwise damage the cell within seconds. This is why fresh liver put into hydrogen peroxide froths violently, a standard classroom demonstration. Amylase, protease and lipase are the enzymes for the other three substrates listed.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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