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Biology
8th -
12thgrade
Biology, Chapter 2, Chemistry of Life Review
40 questions
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- 1. Multiple ChoiceIce floats on water becauseof cohesion.ice has a higher density than water.water shrinks when it freezes.water expands when it freezes.
- 2. Multiple ChoiceThe most abundant compound in most living things iscarbon dioxidewater.sodium chloride.sugar.
- 3. Multiple ChoiceWater molecules are polar, with theoxygen side being slightly positive and the hydrogen side being slightly negative.oxygen and hydrogen sides being slightly positive.oxygen and hydrogen sides being slightly negative.oxygen side being slightly negative and the hydrogen side being slightly positive.
- 4. Multiple ChoiceA solution is a(an)combination of isotopes.chemical reaction.evenly distributed mixture of two or more substances.combination of two or more liquids.
- 5. Multiple ChoiceIf you stir salt into boiling water, you produce amixture called a suspension.mixture called a solution.solution and suspension.mixture only.
- 6. Multiple ChoiceWhen salt is dissolved in water, water is thereactant.solution.solute.solvent.
- 7. Multiple ChoiceWhile preparing a cell culture, a scientist places a colony of bacteria into distilled water and stirs it up. This mixture of water and living cells would best be called a(an)solution.suspension.buffer.adhesion.
- 8. Multiple ChoiceIf the pH of stomach acid and of oven cleaner were measured,both would be below 7.both would be above 7.the pH of stomach acid would be above 7, but the pH of oven cleaner would be below 7.the pH of stomach acid would be below 7, but the pH of oven cleaner would be above 7.
- 9. Multiple ChoiceA substance with a pH of 6 is calledan acid.a base.both an acid and a base.neither an acid nor a base.
- 10. Multiple ChoiceSolutions that contain concentrations of H+ ions lower than pure waterhave pH values below 7.are acids.are bases.are enzymes.
- 11. Multiple ChoiceA monosaccharide is acarbohydrate.lipid.nucleic acid.protein.
- 12. Multiple ChoiceWhich of the following is NOT a function of proteins?store and transmit genetic informationhelp to fight diseasecontrol the rate of reactions and regulate cell processesbuild tissues such as bone and muscle
- 13. Multiple ChoiceThe attraction among molecules of different substances is calledcohesion.adhesion.specific heat.surface tension.
- 14. Multiple ChoiceFats, oils, and cholesterol are all types ofcell membranes.hormones.lipids.fatty acids.
- 15. Multiple ChoiceUse the graphThe reaction with the enzyme occurs at a slower rate.More energy is released by the original reaction.The original reaction is catalyzed.Less energy is needed to start the reaction with the enzyme.
- 16. Multiple ChoiceWhich aspect of a chemical reaction is affected by enzymes?equilibriumratedirectionpH
- 17. Multiple ChoiceAn ion is formed when an atom gains or loseselectrons.protons.bonds.neutrons.
- 18. Multiple ChoiceAtoms connected by covalent bonds sharepairs of electrons.hydrogen ions.ionic compounds.carbon and oxygen.
- 19. Multiple ChoiceWhy is water necessary to your body?It forms the solutes in blood plasma.It prevents large changes in blood pH.It dissolves nonpolar fats and oils.It dissolves and transports substances.
- 20. Multiple ChoiceCarbon is unique due to the carbon atom'sbonding properties.ionic compounds.hydrogen bonding strength.six outer unpaired electrons.
- 21. Multiple ChoiceProteins are composed of which molecules?amino acidsnucleic acidsfatty acidsmonosaccharides
- 22. Multiple ChoiceThe specific reactants that an enzyme acts on are calledproteins.amino acids.catalysts.substrates.
- 23. Multiple ChoiceDNA and RNA are two types ofcarbohydrates.nucleic acids.lipids.proteins.
- 24. Multiple ChoiceWhich phrase best describes atoms?smallest basic units of matterparts of a nucleussingle-celled organismpositively charged particles
- 25. Multiple ChoiceWhich of the following cannot be broken down by ordinary chemical means?elementbondmoleculecompound
- 26. Multiple ChoiceWhich category of macromolecules includes sugars and starches?proteinsphospholipidsunsaturated fatty acidscarbohydrates
- 27. Multiple ChoiceThe lock-and-key model of enzyme function illustrates which important characteristic of enzymes?ability to bond with a productprecise fit with a particular substrateever-changing structureability to bind with many reactants
- 28. Multiple ChoiceWhat is a compound?two atoms of a single element bonded togethera molecule of two oxygen atomsatoms of different elements bonded together in certain ratiosseparate atoms of multiple elements in varying ratios
- 29. Multiple ChoiceWhat element makes up the highest percent of body mass?HydrogenOxygenCalciumPhosphorus
- 30. Multiple ChoiceWhat is the simplest form of a substance, always made of one kind of atom?ElementMixtureCompoundMolecule
- 31. Multiple ChoiceWhat is a combination of two or more substances that are chemically combined?ElementMixtureCompoundMolecule
- 32. Multiple ChoiceWhat is a combination of two or more substances that is NOT chemically combined?MixtureCompoundMoleculeElement
- 33. Multiple ChoiceWhat do we call any particle made up of two or more atoms?ElementMoleculeCompoundMixture
- 34. Multiple ChoiceWhich atomic particle is positively charged, found in the nucleus, and determines what element you have?ProtonElectronNeutronPhoton
- 35. Multiple ChoiceWhich atomic particle is negatively-charged, found outside the nucleus and determines how atoms bond?ProtonElectronNeutronPhoton
- 36. Multiple ChoiceWhich atomic particle has no charge and is found in the nucleus?ProtonNeutronElectronPhoton
- 37. Multiple ChoiceWhat do we call any substance that has a pH of 0 through 6?AcidBaseNeutralAwesome
- 38. Multiple ChoiceWhat do we call any substance with a pH of 7?AcidBaseNeutralAwesome
- 39. Multiple ChoiceWhat do we call any substance with a pH of 8 through 14?AcidBaseNeutralAwesome
- 40. Multiple ChoiceWhich property of water describes the high amount of energy that must be used to raise or lower the temperature of water?AdhesionCohesionHigh heat capacityUniversal solvent
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