Enzymes in Chemistry MCQ (Multiple Choice Questions) PDF Download

Which statement is incorrect about enzymes?

1. they speed up reactions without being used up
2. they raise the activation energy
3. they are all large molecules
4. they are action-specific

Consider the reaction: (NH₂)₂CO + H₂O → NH₃ + CO₂. The reaction is catalyzed by the enzyme

1. amylase
2. protease
3. urease
4. galactose

Consider the reaction: (NH₂)₂CO + H₂O → NH₃ + CO₂. Water in this reaction

1. acts as a solvent
2. helps to dissolve the residues away
3. acts with the urea only after urea is bound to enzyme surface
4. acts as a suspension

Consider the reaction: (NH₂)₂CO + H₂O → NH₃ + CO₂. The substrate in this reaction is

1. urease
2. urea
3. water
4. Hydrogen Gas

Enzymes do not

1. produce side products
2. get consumed up during the process
3. do not change their chemical composition
4. all of above