Given below are two statements: In the light of the above statements, choose the correct answer from the options given below:
- Both Statement I and Statement II are false.
- Statement I is true but Statement II is false.
- Statement I is false but Statement II is true.
- Both Statement I and Statement II are true.
Answer
(4) Both Statement I and Statement II are true.
Solution
Statement I is true: low temperature preserves the enzyme in a temporarily inactive state, whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Statement II is true: an inhibitor that closely resembles the substrate in molecular structure and inhibits the enzyme is a competitive inhibitor (e.g. malonate for succinic dehydrogenase).
Answer: (4)