Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?
Correct answer: D. Most enzymes are proteins but some are lipids
- A. Enzymes require optimum pH for maximal activity
- B. Enzymes are denatured at high temperatures but in certain exceptional organisms, they are effective even at temperatures such as 80° and 90°C
- C. Enzymes are highly specific
- D. Most enzymes are proteins but some are lipids
Explanation
Enzymes are mostly proteins but some are RNA (ribozymes). No lipid which works as an enzyme is known.
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About Enzymes
Enzymes are biological catalysts that lower activation energy without being consumed, and their specificity is explained by the lock and key and induced fit models. Work includes the effects of temperature, pH and substrate concentration on reaction rate, plus competitive and non-competitive inhibition and how these differ.
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