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- 1. Multiple ChoiceThe smallest basic unit of matter is themolecule.atom.compound.cell.
- 2. Multiple ChoiceWhich of the following is formed when an atom gains or loses electrons?elementcompoundmoleculeion
- 3. Multiple ChoiceAtoms in molecules share pairs of electrons when they makecovalent bonds.ionic bonds.hydrogen bonds.polymers.
- 4. Multiple ChoiceWhat gives water many properties that are important to living things?temperaturehydrogen bondsdensityspecific heat
- 5. Multiple ChoiceWhich of the following solutions has the highest H ion concentration?a solution with a pH of 1a solution with a pH of 4a solution with a pH of 7a solution with a pH of 10
- 6. Multiple ChoiceWhat is unique about carbon?bonding propertiesability to bond with oxygenproperties as a reactantproperties as an enzyme
- 7. Multiple Choice
Which substance represented in Figure 2.1 (A or B) is the solvent?both A and Bsubstance Asubstance Bneither A nor B - 8. Multiple ChoiceThe four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, andstarches.fatty acids.monosaccharides.proteins.
- 9. Multiple ChoiceBoth animal fats and plant oils are made up of glycerol andphospholipids.fatty acids.polar molecules.saturated fats.
- 10. Multiple ChoiceSubstances are changed into different substances when bonds break and form duringchemical equilibrium.chemical reactions.ion formation.hydrogen bonding.
- 11. Multiple ChoiceChemical reactions that absorb more energy than they release are calledexothermic.catalyzed.endothermic.activated.
- 12. Multiple ChoiceThe activation energy needed for a chemical reaction is decreased by acatalyst.reactant.product.substrate.
- 13. Multiple ChoiceIn the lock-and-key model of enzyme function shown in Figure 2.2, what is happening in step 2?The catalyzed reaction is releasing a product.The active sites are restructuring the enzyme.The enzyme is causing new bonds to form between the substrates.The substrates are beginning to bind to the enzyme.
- 14. Multiple ChoiceWhich aspect of a chemical reaction is affected by enzymes?directionrateequilibriumpH
- 15. Multiple ChoiceWhich of the following solutions has the highest H ion concentration?a solution with a pH of 1a solution with a pH of 4a solution with a pH of 7a solution with a pH of 10
- 16. Multiple ChoiceThe smallest basic unit of matter is themolecule.atom.compound.cell.
- 17. Multiple ChoiceAtoms in molecules share pairs of electrons when they makecovalent bonds.ionic bonds.hydrogen bonds.polymers.
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