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JEE Main · 2004 · 24 Apr 2004 · Offline · Biomolecules

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Identify the correct statements regarding enzymes
  1. (A)Enzymes are specific biological catalysts that can normally function at very high temperature ( )
  2. (B)Enzymes are specific biological catalysts that the posses well - defined active sites✓ Correct
  3. (C)Enzymes are specific biological catalysts that can not be poisoned
  4. (D)Enzymes are normally heterogeneous catalysts that are very specific in their action

Answer: (B)

Solution

Enzymes are biological catalysts built around well-defined active sites, and it is the exact shape and chemistry of those sites that gives them their specificity. They are not made for extreme heat; most work near body temperature and denature when it rises too far, so a figure like is wrong. They can also be poisoned or inhibited, and they act in the same phase as their substrates, making them homogeneous rather than heterogeneous. The sound description is that they are specific catalysts possessing well-defined active sites.

JEE Main · 2004 · 24 Apr 2004 · Offline · Single correct option

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