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- 1. Multiple ChoiceEnzymes arenucleic acidsproteinslipidscarbohydrates
- 2. Multiple ChoiceWhich of the following binds to the active site of an enzyme?substrateproductcodonnone of the above
- 3. Multiple Choice
Based on the graph, what temperature does this enzyme work best?15 C40 C30 C - 4. Multiple ChoiceWhat is the function of an enzyme?enzymes break themselves into small piecesthey slow down chemical reactionsthey speed up chemical reactionsenzymes combine products to form reactants
- 5. Multiple ChoiceWhat happens when enzymes are heated to a high temperature?The enzymes die.The shapes of the enzyme are altered or denaturedThe enzymes' amino acid sequence changes.The enzymes remain the same
- 6. Multiple ChoiceWhich of the following conclusions can be drawn from this graph?The optimum pH of the enzyme is 6.6.The optimum pH of the enzyme is 5.8The enzyme’s activity increases as pH increases 5.0 to 9.0The enzyme’s activity is greater around pH of 8.0 .
- 7. Multiple ChoiceEnzymes are composed of which of the following monomers?amino acidscarbohydratesnucleotidesmonosaccharides
- 8. Multiple Choice
Which of the following are true about enzymes? (Choose all that apply)
Enzymes speed up chemical reactions.
Enzymes react best at a specific temperature.
Enzymes only control ONE type of reaction.
Enzymes are made of fatty acids.
- 9. Multiple ChoiceWhat is another name for enzymes?chemical catalystsmicroorganismsbiological catalystsinorganic catalysts
- 10. Multiple ChoiceThe "lock and key hypothesis" attempts to explain the mechanism of?Vacuole formationPinocytosisSharing of electronsEnzyme specificity
- 11. Multiple ChoiceWhat is the name for the mechanism of enzyme activity?Lock and keyjigsaw puzzlehammer and nailtwo hands pattern
- 12. Multiple ChoiceWhat is a Cataylst?A substance that speeds up a rate of chemical reaction.Molecules that make enzymes work harder and fasterreaction of an enzymeA substance that slows down a rate of chemical reaction.
- 13. Multiple ChoiceThe diagram shows the series of a reactions that convert lactose into a usable form .
If enzyme 4 is denatured (stops working), the levels of which substance will increase?LactoseGalactoseGlucose-1-Phosphate - 14. Multiple ChoiceThe graph shows the effect of temperature on enzyme action. What characteristic do enzymes E1, E2, and E3 share?Their activity increases between 20°C and 30°C.Their activity is greatest between 5°C and 10°C.Their activity is at a low level between 15°C and 25°C.Their activity is at a high level between 30°C and 40°C.
- 15. Multiple Choice
What is the optimal pH of enzyme A?
8
2
5.7-10
10
- 16. Multiple ChoiceWhat is the pH range of enzyme A?20-3.73.70
- 17. Multiple ChoiceWhat is indicated by letter A?enzymeproductsubstrateactive site
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