Chapter Questions
The four most common elements in the human body include _________.a. calciumb. sodiumc. carbond. nitrogene. Both $\mathrm{c}$ and $\mathrm{d}$ are correct.
The particle indicated as $\mathrm{A}$ in the figure is a(n)a. protonb. neutronc. electrond. orbital
The particle indicated as $\mathrm{C}$ in the figure above carries a charge.a. positiveb. negativec. neutral
Of the identified particles in the figure above, particle has a mass of less than 1 dalton.a. $\mathrm{A}$b. Bc. Cd. All of the above carry a mass of 1 dalton.
Carbon has an atomic mass of 12.01 . It has an atomic number of 6. A carbon atom nucleus has ${ }$ neutrons.a. 12b. 6c. 18d. 4
The type of bond indicated here is a(n) bond.a. ionicb. covalentc. polar covalentd. hydrogen
A substance that is attracted to water or dissolves in wateris referred to asa. hydrophobicc. cohesiveb. hydrophilicd. adhesive
Water serves as a temperature buffer because it__________.a. is cohesiveb. is capable of dissolving many compoundsc. has a high specific heatd. has a high heat of vaporization
On this pH scale, what is the hydrogen ion concentration difference between human blood (pH 7) and ammonia $(p H 11) ?$a. 10 units Acidic pHb. 100 unitsc. 1,000 units d. 10,000 units
This figure illustrates a _______a. carbohydrateb. lipidc. proteind. nucleic acid
$\mathrm{A}(\mathrm{n})$fat is a solid at room temperature and includes straight, long hydrocarbon chains with no double bonds.a. unsaturatedb. saturatedc. hydrophilic
The class of lipid that has both a hydrophilic and a hydrophobic end is _________a. steroidsb. eicosanoidsc. phospholipidsd. triglycerides
This figure illustrates that enzymes ______a. require substrateb. are specific catalystsC. have an active sited. All of the above are correct.
In DNA, which base complements adenine?a. cytosineb. guaninec. thymined. uracil
Some atoms are held together in compounds by attractive forces of positive and negative charges. Which of the following bond types rely on these attractive forces?a. ionic bondb. covalent bondc. hydrogen bondd. All of the above utilize positive/negative attraction.