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- 1. Multiple-choice45 seconds1 pt
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-choice30 seconds1 pt
Enzymes................
increases activation energy
decreases activation energy
maintains activation energy
- 3. Multiple-choice30 seconds1 pt
Activation energy is the energy needed ................... a reaction
to end the reaction
throughout the reaction
to start the reaction
- 4. Multiple-choice30 seconds1 pt
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-choice30 seconds1 pt
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-choice30 seconds1 pt
Enzymes act based on the .............. hypothesis
large surface area to volume ratio
fork and spoon
lock and hammer
lock and key
- 7. Multiple-choice30 seconds1 pt
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-Blank1 minute1 pt
When the substrate and the enzyme binds, the form the .....
- 9. Multiple-choice45 seconds1 pt
Enzyme action is affected by
pH
environment
temperature
amount of light
- 10. Fill-in-the-Blank1 minute1 pt
Extreme pH and temperature will cause the enzyme to.....
- 11. Fill-in-the-Blank1 minute1 pt
At................ pH and temperature, the enzymes will be most active.
- 12. Multiple-choice45 seconds1 pt
Digestive enzymes in man work best at..............
5oC
25oC
45oC
37oC
- 13. Multiple-choice30 seconds1 pt
Salivary amylase work best at............ pH
neutral
acidic
alkaline
- 14. Multiple-choice30 seconds1 pt
Lipase work best at............ pH
neutral
acidic
alkaline
- 15. Multiple-choice30 seconds1 pt
Protease work best at............ pH
neutral
acidic and alkaline
alkaline and neutral
