Chemistry Chapter 2 Quizzes

Quiz 2.1 and 2.2

1.________ are the smallest unit of matter. 2.Atoms in molecules share electrons and form __________ bonds. 3.What is formed when atoms gain or lose electrons? 4.__________ bonds give water the properties that are important to living things.

5.H 2 O, CO 2 and CH 4 are all examples of ____________. 6.The most abundant compound in living things is ________. 7.When salt is dissolved in water, water is the ________ and salt is the _______. 8.A pH of 3 indicates _______ while a pH of 11 is a ________.

1.Atoms 2.Covalent 3.Ions 4.Hydrogen 5.Compounds 6.Water 7.Solvent, solute 8.Acid, base Answers Quiz 2.1 and 2.2

Quiz 2.3

1.Carbohydrates, proteins, lipids and nucleic acids are the four main types of ________- based molecules. 2.Repeating units of identical or nearly identical compounds are ____________. 3.Animal fats and plant oils are made up of glycerol and ________________. 4.A monosaccharide is a ________________.

5.Which macromolecule is the storage form of energy? 6.Which macromolecule is the main energy source in living things? 7.Proteins are made by linking _____________. 8.____________ are the monomers for nucleic acids. 9.Enzymes fall under which type of macromolecule? 10.How many bonds can carbon form?

Answers Quiz Carbon 2.Monomers 3.Fatty acids 4.Carbohydrate 5.Lipids 6.Carbohydrates 7.Amino acids 8.Nucleotides 9.proteins 10. 4

Quiz 2.4 and 2.5

1. _______ are the proteins that speed up the rate of chemical reactions. 2. A __________is the process by which atoms or groups of atoms in substances are reorganized into different substances through the breaking or forming of bonds. 3. _________ are the starting substances, on the left side of the arrow.

4. ________ is reached when both the reactants and products are made at the same rate. 5. The ___________is the minimum amount of energy needed for reactants to form products in a chemical reaction. 6. A ________ is a substance that lowers the activation energy needed to start a chemical reaction.

7. The reactants that bind to the enzyme are called _________. 8. What is unique about carbon is that it can form ______ bonds. 9. ______, hydrogen, nitrogen, and oxygen make up about 96% of living matter. 10. The “_________” model demonstrate how enzymes work.

1.Enzymes 2.Chemical reactions 3.Reactants 4.Equilibrium 5.Activation energy 6.Catalyst 7.Substrate Carbon 10.Lock and key Answers Quiz 2.4 and 2.5