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- 1. Multiple ChoiceWhich of these is NOT true.Enzymes can denature (change shape) when the temperature gets too high.Enzymes can only be used once in a chemical reaction.Enzymes can denature when the pH changes.Enzymes speed up chemical reactions.
- 2. Multiple Choice
Attractions between different water molecules are called
Covalent bondsIonic bondsPolar bondsHydrogen bonds - 3. Multiple ChoiceAccording to the pH range which substance is more acidic than lemon juiceHydrochloric acidcabbagemilk
- 4. Multiple ChoiceWhat is the attraction between molecules of different substances?AdhesionSuspensionCohesionSolution
- 5. Multiple ChoiceWhat is a catalyst?Process that changes one set of chemicals into anotherElement or compound that enters into a chemical reactionElement or compound produced by a chemical reactionSubstance that speeds up the rate of the chemical reaction
- 6. Multiple ChoiceAll organic compounds contain the elementcarbonnitrogenphosphorussulfur
- 7. Multiple ChoiceSubunit is to Macrocolecule like ___ is to ____Building is to Bricks.Brick is to Building.Carpenter is to Building.Building is to Carpenter.
- 8. Multiple ChoiceWhat property of water helps to moderate earth's temperature?adhesionchohesionSpecific heat capacityLatent heat of vaporization
- 9. Multiple ChoiceWhy does ice float?As water freezes, it expands and its density decreases.As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.As water freezes, air becomes trapped between the hydrogen bonds of water molecules.As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
- 10. Multiple ChoiceWhich of the following is LEAST likely to dissolve in water?nonpolar fats and oilspolar sugar moleculessalt made of a positive sodium ion and a negative chloride ionall of the substances will dissolve easily in water
- 11. Multiple ChoiceWhich formula represents an amino acid?a.b.c.d.
- 12. Multiple ChoiceWhich one isn't a biomolecule?CarbohydrateLipidsProteinsNitrogen bases
- 13. Multiple ChoiceWhich one is NOT a function for Carbohydrates?Short Term Energy
Support Structures for Cell Walls
DigestionPlant Storage of Sugars
- 14. Multiple ChoiceWhich two bio molecules have only Carbon, Hydrogen, and Oxygen?Carbs/Nucleic AcidsLipids/CarbsProteins/Nucleic AcidsCarbs/Proteins
- 15. Multiple ChoiceWhat is the primary function of carbohydrates in your body?Speed up chemical reactions.Give immediate energy.Help to store energy.Build cell walls in plants.
- 16. Multiple ChoiceWhat is the purpose of an enzyme?give permission for the reactionraise activation energyspeed up reactionscontrol how many reactions occur
- 17. Multiple ChoiceEnzymes are capable of increasing the rate of a chemical reaction within a living cell. Enzymes accomplish this through which of the following means?reducing the number of productsreducing the activation energyincreasing the temperature of the cellincreasing the concentration of reactants
- 18. 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 .
- 19. Multiple ChoiceWhich macromolecule is shown?lipidproteinnucleic acidcarbohydrate
- 20. Multiple ChoiceWhich is NOT a unique property of water?Frozen water floats on liquid water.Water covers most of the Earth’s surface and retains a large amount of heat.Water molecules stick to each other through hydrogen bonds.Water cools very rapidly.
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