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Biochem, Metabolism,
| Question | Answer |
|---|---|
| Within the centrosome, there is a pair of structures arranged perpendicular to each other called the | centrioles |
| The two types of cell appendages that use microtubules and motor proteins to facilitate movement are and | flagella and cilia |
| A covalent bond is one in which a pair of electrons | is shared between two atoms |
| Nitrogen has three unpaired electrons in its outer shell. What is the maximum number of covalent bonds that a nitrogen atom can form with other atoms while still remaining uncharged? | 3 |
| Identify the major classes of lipids | Steroids Waxes Fats Phospholipids |
| A(n) ______ bond is formed when two atoms of different electronegativities share electrons. | polar covalent |
| The measure of an atom's ability to attract electrons when in a bond with another atom is called its | electronegativity |
| Chemical bonds can form among atoms due to the presence of unpaired _____electrons. | valence |
| Electronegativity differences between atoms dictate the polarity of molecules by ______. | influencing whether covalent bonds are polar or nonpolar |
| Consider the following covalent bonds. Which ones are nonpolar? | O-O C-H H-H |
| A hydrogen bond forms when a hydrogen atom with a partial ____charge becomes electrically attracted to an electronegative atom with a partial____ charge. | positive and negative |
| Each hydrogen atom in a water molecule has a partial____ charge, whereas the oxygen atom has a partial ____charge. | positive and negative |
| An ionic bond forms when a positively charged ion, called a(n) ____ interacts with a negatively charged ion, called a(n) _____ | cation and anion |
| What type of bond occurs when a cation binds to an anion? | ionic |
| A solution is composed of ______ dissolved in a ______. | solutes and solvent |
| Which of the following describe molecules that only have hydrophobic regions? | Contain many nonpolar covalent bonds, Are relatively insoluble in water, Dissolve well in nonpolar solvents |
| Hydrophobic molecules tend to contain many _____ covalent bonds, such as the bond between two carbon atoms or the bond between carbon and hydrogen. | nonpolar |
| The following statements are about atoms that have partially filled energy shells. | They tend to share, lose, or gain electrons. They can form compounds. |
| Which of the following statements describe hydrophilic molecules? | They are soluble in water. |
| Groups of atoms with characteristic chemical features and properties are called ______groups. | functional |
| Which functional group is acidic? | carboxyl group |
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