MCQ
The P-wave in ECG is generated:
- AAt the beginning of ventricular contraction
- BAt the beginning of atrial relaxation
- ✓At the end of atrial relaxation
- DNone of the above
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Statement $I$ : Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat.
Statement $II$ : When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.
In the light of the above statements, choose the correct answer from the options given below :