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- 1. Multiple Choice
Enzymes are
chemical catalyst
biological catalysts
slows down reaction
alter or speed up chemical reactions
remain chemically unchanged at the end of the reaction
- 2. Multiple Choice
Enzymes................
increases activation energy
decreases activation energy
maintains activation energy
- 3. Multiple Choice
Activation energy is the energy needed ................... a reaction
to end the reaction
throughout the reaction
to start the reaction
- 4. Multiple Choice
Enzymes are required in minute amounts because
remain chemically unchanged at the end of the reaction so that can be reused again and again.
highly specific in their action.
They also have a specific active site which only allows substrates with a complementary 3-D shape to that of the active site to bind.
- 5. Multiple Choice
Enzymes are highly specific in their action because
remain chemically unchanged at the end of the reaction so that can be reused again and again.
they also have a specific active site which only allows substrates with a complementary 3-D shape to that of the active site to bind
T.required in minute amounts because
- 6. Multiple Choice
Enzymes act based on the .............. hypothesis
large surface area to volume ratio
fork and spoon
lock and hammer
lock and key
- 7. Multiple Choice
In the lock and key hypothesis,
the enzyme is the lock and the substrate is the key
the substrate is the lock and the enzyme is the key
both substrate and enzyme is the lock
both substrate and enzyme is the key
- 8. Fill in the Blank
When the substrate and the enzyme binds, the form the .....
- 9. Multiple Choice
Enzyme action is affected by
pH
environment
temperature
amount of light
- 10. Fill in the Blank
Extreme pH and temperature will cause the enzyme to.....
- 11. Fill in the Blank
At................ pH and temperature, the enzymes will be most active.
- 12. Multiple Choice
Digestive enzymes in man work best at..............
5oC
25oC
45oC
37oC
- 13. Multiple Choice
Salivary amylase work best at............ pH
neutral
acidic
alkaline
- 14. Multiple Choice
Lipase work best at............ pH
neutral
acidic
alkaline
- 15. Multiple Choice
Protease work best at............ pH
neutral
acidic and alkaline
alkaline and neutral
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